KR102374845B1 - Color Filter Array Substrate and Method For Fabricating the Same, and Organic Light Emitting Diode Display Device Using the Same - Google Patents

Abstract

The present invention discloses a color filter array substrate, a method for manufacturing the same, and an organic light emitting display device using the same. The disclosed color filter array and organic light emitting display device of the present invention includes a first substrate including a thin film transistor and a second substrate facing the first substrate, and the second substrate facing the first substrate A black matrix disposed on one surface of the substrate to define a sub-pixel region, and a barrier rib disposed on the black matrix. In addition, the sub-pixel region includes a color filter layer including a fluorescent material, and an overcoat layer disposed on a second substrate including the black matrix, the barrier rib, and the color filter layer, wherein the fluorescent material is overcoated. It is prepared by dissolving in layers.
Through this, an organic light emitting display device having a simple process and improved transmittance and luminous efficiency can be provided.

Description

Color Filter Array Substrate and Method For Fabricating the Same, and Organic Light Emitting Diode Display Device Using the Same}

The present invention relates to a color filter array substrate, a manufacturing method thereof, and an organic electroluminescence display using the same, and more particularly, to a color filter array substrate capable of improving transmittance and light characteristics, a manufacturing method thereof, and organic electroluminescence using the same It is about the display device.

BACKGROUND ART A display device is a device that displays an image, and an organic light emitting diode display (OLED display) has recently been attracting attention. A conventional organic light emitting diode display includes an organic light emitting diode that emits light to display an image. The organic light emitting device includes a first electrode, an organic light emitting layer, and a second electrode sequentially stacked.

The organic light emitting display device further includes a color filter layer positioned to correspond to the first electrode and converting white light emitted from the organic light emitting layer into another color, and a black matrix adjacent to the color filter layer.

Recently, a color filter layer including red, green, blue, and white color filter patterns is used to increase luminous efficiency. In order to increase the luminous efficiency of the organic light emitting diode display, the amount of dye or pigment is added to the color filter layer. However, as the amount of dye or pigment is added, there is a problem in that the transmission efficiency of the organic light emitting diode display is lowered.

The present invention provides a color filter array substrate capable of improving transmittance and luminous efficiency of an organic light emitting display device by disposing red, green, and blue fluorescent materials on red, green, and blue color filter patterns, respectively, and a method for manufacturing the same An object of the present invention is to provide an organic light emitting display device using the same.

In addition, the present invention provides a color filter array substrate with a simple process by dissolving red, green, and blue phosphors included in the red, green and blue color filter patterns into an overcoat layer disposed on the color filter pattern, and a method for manufacturing the same; An object of the present invention is to provide an organic light emitting display device using the same.

A color filter array substrate, a method for manufacturing the same, and an organic light emitting display device using the same of the present invention for solving the problems of the prior art as described above It includes a second substrate, is disposed on one surface of the second substrate facing the first substrate, includes a black matrix defining a sub-pixel region, and includes a barrier rib disposed on the black matrix. In addition, the sub-pixel region includes a color filter layer including a fluorescent material, and an overcoat layer disposed on a second substrate including the black matrix, the barrier rib, and the color filter layer, wherein the fluorescent material is overcoated. By dissolving into a layer, an organic light emitting display device having a simple process and improved transmittance can be provided.

A color filter array substrate and a method for manufacturing the same and an organic light emitting display device using the same according to the present invention, by disposing red, green and blue fluorescent materials on red, green, and blue color filter patterns, respectively There is a first effect that can improve transmittance and luminous efficiency.

In addition, the color filter array substrate and the method for manufacturing the same according to the present invention, and the organic electroluminescence display using the same, the fluorescent material included in the color filter pattern is dissolved into an overcoat layer disposed on the color filter pattern, so that the process is simple. 2 works.

1 is a cross-sectional view illustrating an organic light emitting display device according to an embodiment of the present invention.
2A to 2B are diagrams illustrating a method of manufacturing a color filter array according to an embodiment of the present invention.
3 is a graph comparing red light efficiency according to a comparative example and an embodiment.
4 is a graph comparing green light efficiency according to a comparative example and an embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The embodiments introduced below are provided as examples so that the spirit of the present invention can be sufficiently conveyed to those skilled in the art. Accordingly, the present invention is not limited to the embodiments described below and may be embodied in other forms. And in the drawings, the size and thickness of the device may be exaggerated for convenience. Like reference numerals refer to like elements throughout.

1 is a cross-sectional view illustrating an organic light emitting display device according to an embodiment of the present invention. Referring to FIG. 1 , an organic light emitting display device according to an embodiment of the present invention includes a first substrate 100 including a thin film transistor Tr and organic light emitting devices 112 , 114 , and 115 , the first substrate 100 and and a second substrate 200 disposed to face each other.

The thin film transistor Tr disposed on the first substrate 100 includes a semiconductor layer 104 , a gate electrode 106 , a gate insulating layer 107 , a source electrode 108 , and a drain electrode 109 . In addition, the organic light emitting diodes 112 , 114 , and 115 include a first electrode 112 , an organic light emitting layer 114 , and a second electrode 115 .

In detail, in the thin film transistor Tr, a semiconductor layer 104 is formed on the first substrate 100 . The semiconductor layer 104 includes a source region 101 , a channel region 102 , and a drain region 103 . Before forming the semiconductor layer 104 , a buffer layer may be formed on the entire surface of the first substrate 100 .

A gate insulating layer 105 is formed on the semiconductor layer 104 . A gate electrode 106 is formed on the gate insulating layer 105 . The gate electrode 106 may be an alloy formed from Cu, Ag, Al, Cr, Ti, Ta, Mo, or a combination thereof. In addition, although it is formed as a single metal layer in the drawings, it may be formed by stacking at least two or more metal layers in some cases.

An interlayer insulating layer 107 is formed on the gate electrode 106 . A contact hole for exposing the source region 101 and the drain region 103 is formed in the interlayer insulating layer 107 and the gate insulating layer 105 .

Thereafter, a source electrode 108 and a drain electrode 109 are disposed to be spaced apart from each other on a portion of the contact hole and an upper surface of the interlayer insulating layer 107 . The source electrode 108 and the drain electrode 109 are connected to the source region 101 and the drain region 103 of the semiconductor layer 104 of the thin film transistor Tr by the contact hole.

Here, the source electrode 108 and the drain electrode 109 may be an alloy formed from Cu, Ag, Al, Cr, Ti, Ta, Mo, or a combination thereof. In addition, although the source electrode 108 and the drain electrode 109 are formed of a single metal layer in the drawings, in some cases, at least two or more metal layers may be stacked to form it. In this way, the thin film transistor Tr is formed on the substrate 100 .

A protective layer 110 for protecting the source electrode 108 and the drain electrode 109 is disposed on the source electrode 108 and the drain electrode 109 . Then, a planarization layer 111 is formed on the passivation layer 110 . The planarization layer 111 may be formed to planarize a non-uniform surface of the thin film transistor Tr.

A contact hole exposing the drain electrode 109 of the thin film transistor Tr may be formed in the planarization layer 111 and the passivation layer 110 . The first electrode 112 of the organic light emitting device connected to the drain electrode 109 through the contact hole is disposed on a portion of the top surface of the planarization layer 111 .

Here, the first electrode 112 may be an anode electrode. However, the first electrode 112 is not limited thereto, and the first electrode 112 may be a cathode. Hereinafter, an embodiment in which the first electrode 112 is an anode will be mainly described.

The first electrode 112 may be formed of a single layer made of a transparent conductive material having a relatively high work function value. Through this, a bottom emission type organic light emitting display device that emits light from the second electrode 115 to the first electrode 112 can be implemented.

In addition, a reflective layer may be further included under the first electrode 112 . Through this, a top emission type organic light emitting display device that emits light upward by reflecting light emitted from the second electrode to the first electrode 112 may be implemented.

The shape of the first electrode 112 is not limited to the drawings, and the first electrode 112 may be formed in multiple layers. For example, it may have a triple layer structure in which a second layer is formed on a first layer and a third layer is formed on the second layer.

Here, the first layer and the third layer may be a transparent conductive material. For example, the transparent conductive material may be ITO or IZO. The second layer may be a reflective layer. In this case, the second layer may be a metal or a metal alloy layer. For example, it may be Ag or a metal alloy layer containing Ag. Through this, the organic light emitting device reflects the light emitted from the second electrode to the first electrode 112, thereby realizing a top emission type organic light emitting display device.

A bank pattern 113 may be formed on the planarization layer 111 on which the first electrode 112 is formed. In this case, the bank pattern 113 may define an emission region of a sub-pixel. The bank pattern 113 may be formed by exposing a portion of the upper surface of the first electrode 112 in the light emitting region.

An organic light emitting layer 114 may be formed on the first electrode 111 exposed through the hole of the bank pattern 113 in the light emitting region. The organic light emitting layer 114 may be configured as a single layer made of a light emitting material.

In addition, the organic light emitting layer 114 has a hole injection layer (HIL), a hole transport layer (HTL), an emitting layer (Emitting Material Layer; EML), an electron transporting layer (electron transporting layer) in order to increase the luminous efficiency. ) and may be composed of a multilayer of an electron injection layer.

A second electrode 115 may be formed to face the first electrode 112 on the first substrate 100 on which the organic light emitting layer 114 and the bank pattern 113 are formed. In this case, the second electrode 115 may be a cathode electrode.

A second substrate 200 may be disposed to face the first substrate 100 . A black matrix 210 may be disposed on one surface of the second substrate 200 facing the first substrate 100 . The black matrix 210 may define a sub-pixel area. The black matrix 210 may be disposed to be spaced apart from other black matrices 210 formed adjacent to each other.

Through this, an opening may be formed between the black matrix 210 and another black matrix 210 disposed adjacent to the black matrix 210 . A color filter layer 230 may be disposed in the opening. That is, the color filter layer 230 may be disposed in the sub-pixel area defined by the black matrix 210 .

A partition wall 211 may be disposed on the black matrix 210 . Here, the width of the partition wall 211 may be smaller than the width of the black matrix 210 . Also, the height of the upper surface of the partition wall 211 may be higher than the height of the upper surface of the color filter layer 230 .

The partition wall 211 may be formed of the same material as the black matrix 210 . However, the present invention is not limited thereto, and the partition wall 211 may be formed of various materials. For example, it may be formed of an organic insulating material such as photoacryl or polyimide.

Also, the color filter layer 230 includes a plurality of color filter patterns. In detail, the color filter layer 230 may include a red color filter pattern, a green color filter pattern, a blue color filter pattern, and a white color filter pattern.

The color filter layer used in the organic light emitting display device realizes high color reproduction by increasing the content of dyes or pigments included in the color filter layer. However, when the content of the dye or pigment included in the color filter layer is increased, there is a problem in that the transmittance is decreased.

Accordingly, the organic light emitting display device according to the present invention is formed by dividing the color filter layer 230 including the dye or pigment and the fluorescent material layer. Through this, the organic light emitting display device according to the present invention realizes high color reproduction and high transmittance.

In detail, in the organic light emitting display device according to the present invention, an overcoat layer 240 including a fluorescent material is disposed on a color filter layer 230 including a dye or a pigment. Accordingly, the color filter layer 230 and the fluorescent material layer may be formed separately.

At this time, since the height of the upper surface of the partition wall 211 is made higher than the height of the upper surface of the color filter layer 230 , mixing of different colors is prevented due to the fluorescent material disposed on the overcoat layer 240 . can do. In this way, a color filter array substrate in which the color filter layer 230 including the dye or pigment and the fluorescent material layer are separated may be formed.

Here, when light is irradiated to the color filter array substrate, the light may collide with the fluorescent material. Through this, the fluorescent material emits light, and the amount of irradiated light and the light amount of the fluorescent material are added to each other, thereby improving light efficiency.

In detail, when light is irradiated onto the color filter array substrate and collides with the red fluorescent material disposed on the red color filter pattern, the red fluorescent material may emit red light. Also, when light is irradiated onto the color filter array substrate and collides with a green fluorescent material disposed on the green color filter pattern, the green fluorescent material may emit green light. In addition, when light is irradiated onto the color filter array substrate and collides with the blue fluorescent material disposed on the blue color filter pattern, the blue fluorescent material may emit blue light. Through this, the light efficiency of the organic light emitting display device can be improved.

An encapsulation layer 116 may be interposed between the first substrate 100 and the second substrate 200 . The encapsulation layer 116 may be formed of resin. In addition, the encapsulation layer 116 may be composed of a plurality of layers. For example, the encapsulation layer 116 may include a plurality of passivation layers and an adhesive layer. In addition, the encapsulation layer 116 may include a filler that is a moisture absorbent.

In the organic light emitting display device, the organic light emitting elements 112 , 114 , and 115 may be damaged by external oxygen and moisture, and thus may not emit light or may have a fatal effect on lifespan. In this case, the encapsulation layer 116 may protect the organic light emitting devices 112 , 114 , and 115 formed on the first substrate 100 from external moisture.

In order to form the color filter layer 230 and the fluorescent material separately, a fluorescent material is further included in the color filter layer 230 including a dye or a pigment. In this case, the color filter layer 230 may include a red color filter pattern, a green color filter pattern, and a blue color filter pattern, and the red color filter pattern, the green color filter pattern, and the blue color filter pattern are each formed of a red fluorescent material. , may further include a green fluorescent material and a blue fluorescent material.

The fluorescent material may be a fluorescent dye or a quantum dot. In this case, the fluorescent material may include an alkyl group or an amine group. Here, the alkyl group or the amine group may be a substituent. In addition, the fluorescent material may have an absorption wavelength of 380 nm to 490 nm.

An overcoat layer 240 may be disposed on the second substrate 200 including the first black matrix 210 , the second black matrix 211 , and the color filter layer 230 . Here, the overcoat layer 240 may include one or more solvents in which the fluorescent material is dissolved.

The solvent included in the overcoat layer 240 is propylene glycol methyl ether acetate, 3-methoxybutyl acetate, dipropylene glycol monomethyl ether, 3-methoxy-1-butanol, propylene glycol monomethyl ether, ethyl 3-ethoxy propionate, methyl-3- Methoxy propionate (methyl-3-methoxy propionate), diethylene glycol butyl methyl ether, diethylene glycol ethylmethyl ether, 1-ethoxy-2-propanol ( 1-ethoxy-2-propanol), cyclohexanone, ethylene glycol dimethyl ether, or diethylene glycol diethyl ether may be one selected from the group consisting of. When the overcoat layer 240 is formed on the color filter layer 230 , the fluorescent material included in the color filter layer 230 may be dissolved into the overcoat layer 240 . More specifically, since the fluorescent material includes a substituent that is selectively dissolved in the overcoat layer 240 , it may be selectively dissolved in the overcoat layer 240 . In this case, the fluorescent material may include an alkyl group or an amine group.

That is, since the overcoat layer 240 contains the above solvent, the fluorescent material may be dissolved. Accordingly, the overcoat layer 240 may include a dissolved fluorescent material. Accordingly, the overcoat layer 240 may further include a fluorescent material layer.

In the organic light emitting display device according to the present invention, the fluorescent material included in the color filter layer 230 is selectively dissolved in the overcoat layer 240 to form the overcoat layer 240 including the fluorescent material layer. Through this, the organic light emitting display device according to the present invention has the effect of simultaneously realizing high color reproduction and high transmittance. In addition, the red, green, and blue color filter patterns each contain red, green, and blue fluorescent materials, and the red, green, and blue fluorescent materials are dissolved in the overcoat layer, thereby realizing high color reproduction and high transmittance without a separate process. there is an effect

Next, a detailed review of the method of manufacturing the color filter array substrate according to the embodiment of the present invention with reference to FIGS. 2A to 2D is as follows. 2A to 2B are diagrams illustrating a method of manufacturing a color filter array according to an embodiment of the present invention.

Referring to FIG. 2A , a black resin material is formed on the entire surface of the second substrate 200 . Thereafter, a photoresist is formed on the black resin material. In this case, the photoresist may be a negative photoresist. The negative photoresist is a photosensitive material that is a material that is cured when irradiated with light.

Then, the black resin material may be patterned through a photoresist process. Through this, the black matrix 210 may be formed on the second substrate 200 to be spaced apart from other adjacent black matrices 210 . That is, an opening may be formed between the black matrix 210 and another adjacent black matrix 210 .

A barrier rib material is formed on the second substrate 200 on which the black matrix 210 is formed. Here, the barrier rib material may be an organic insulating material. A photoresist is formed on the barrier rib material. Then, the barrier rib material is patterned through a photoresist process. Through this, the partition wall 211 may be formed on the black matrix 210 .

However, the process of forming the barrier rib 211 is not limited thereto, and the barrier rib 211 may be formed of the same material as the black matrix 210 . Specifically, a black resin material is applied on the second substrate 200 . After that, a photoresist is applied on the black resin material. Then, the black resin material is patterned using a halftone mask. The halftone mask may include a transmissive part, a semi-transmissive part, and a blocking part.

At this time, the photoresist facing the transmissive portion of the halftone mask is cured by the irradiated light. In addition, the photoresist facing the transflective portion of the halftone mast is semi-cured by the irradiated light.

For this reason, the photoresist facing the transmissive portion of the halftone mask is formed as a photoresist pattern having a high step in the region where the barrier rib is located later. In addition, the photoresist facing the semi-transmissive portion of the halftone mask is formed as a photoresist pattern with a low step difference in a region where the barrier rib is not located. In addition, the photoresist facing the blocking portion of the halftone mask is removed to expose the black resin material.

The exposed black resin material is etched using the photoresist patterns as a mask. By etching the black resin material, a black resin material pattern in which a step is formed may be formed. Here, the black resin material pattern region having a high step may be the same as the partition wall 211 . In addition, a region of the black resin material pattern having a low level difference may be the same as that of the black matrix 210 .

Thereafter, the photoresist pattern formed in the region corresponding to the transflective portion of the halftone mask may be removed through an ashing process. At this time, a portion of the photoresist pattern formed in the region corresponding to the transmission portion of the heart phone mask may also be removed.

Accordingly, the black resin material pattern formed under the photoresist pattern formed in the region corresponding to the transflective portion of the halftone mask is exposed. In addition, the black resin material pattern formed under the photoresist pattern formed in the region corresponding to the transmission portion is not exposed.

Thereafter, a portion of the black resin material pattern is etched using the photoresist pattern that has undergone the ashing process as a mask. Then, the photoresist pattern may be removed. Accordingly, the barrier rib 211 having a high step and the black matrix 210 having a low step may be formed. Through this, the process of forming the partition wall 211 and the black matrix 210 may be simplified.

A color filter layer 230 may be disposed on the opening formed by the black matrix 210 . Here, the height of the upper surface of the partition wall 211 may be higher than the height of the upper surface of the color filter layer 230 . Also, the color filter layer 230 may include a red color filter pattern, a green color filter pattern, a blue color filter pattern, and a white color filter pattern.

2B and 2C , an overcoat layer 240 may be disposed on the second substrate 200 including the black matrix 210 , the barrier ribs 211 , and the color filter layer 230 . In this case, the color filter layer 230 may include a dye or a pigment 231 and further include a fluorescent material 232 . In detail, the fluorescent material 232 may be included in the red color filter pattern, the green color filter pattern, and the blue color filter pattern as a red fluorescent material, a green fluorescent material, and a blue fluorescent material, respectively.

Here, the fluorescent material 232 may be a fluorescent dye or a quantum dot. In this case, the fluorescent material 232 may include an alkyl group or an amine group that is a substituent soluble in the solvent of the overcoat layer. In addition, the fluorescent material 232 may have an absorption wavelength of 380 nm to 490 nm.

In addition, the overcoat layer 240 may include one or more solvents in which the fluorescent material 232 is dissolved. Specifically, the solvent included in the overcoat layer 240 is propylene glycol methyl ether acetate, 3-methoxybutyl acetate, and dipropylene glycol monomethyl ether. ether), 3-methoxy-1-butanol, propylene glycol monomethyl ether, ethyl 3-ethoxy propionate, methyl -3-methoxy propionate, diethylene glycol butyl methyl ether, diethylene glycol ethylmethyl ether, 1-ethoxy-2 -Propanol (1-ethoxy-2-propanol), cyclohexanone (cyclohexanone), ethylene glycol dimethyl ether (ethylene glycol dimethyl ether) or diethylene glycol diethyl ether (diethylene glycol diethyl ether), etc. may be selected from the group consisting of there is.

Here, since the fluorescent material 232 has the above substituents, it may be dissolved in the overcoat layer 240 . In detail, solubility in a specific solvent of the overcoat layer 240 may be selectively implemented according to a substituent of the fluorescent material 232 .

That is, since the layer of the fluorescent material 232 is formed separately from the color filter layer 230 , fluorescence efficiency can be improved. In addition, the fluorescent material 232 is separated from the color filter layer 230 only by reaction between the substituent of the fluorescent material 232 and the solvent included in the overcoat layer 240 , thereby simplifying the process.

Next, referring to FIG. 2D , the fluorescent material 232 is dissolved in the solvent of the overcoat layer 240 to be formed separately from the color filter layer 230 . In this case, the fluorescent material 232 may be disposed on the red color filter pattern, the green color filter pattern, and the blue color filter pattern. In this way, a color filter array substrate can be formed.

When the light 300 is irradiated onto the color filter array substrate, the light 300 may collide with the fluorescent material 232 included in the overcoat layer 240 .

When the light 300 is irradiated to the color filter array substrate and collides with the red fluorescent material 232 disposed on the red color filter pattern, the red fluorescent material 232 may emit red light. Also, when the light is irradiated onto the color filter array substrate and collides with the green fluorescent material 232 disposed on the green color filter pattern, the green fluorescent material 232 may emit green light. And, when the light 300 is irradiated to the color filter array substrate and collides with the blue fluorescent material 232 disposed on the blue color filter pattern, the blue fluorescent material 232 may emit blue light. there is.

The color filter array substrate of the organic light emitting display device according to the present invention is formed separately from the fluorescent material 232 and the color filter layer 230, so that light efficiency can be improved. In addition, when the color filter layer 230 including the fluorescent material 232 and the overcoat layer 240 are formed in contact with each other, only the reaction between the substituent of the fluorescent material 232 and the solvent included in the overcoat layer 240 is the above Since the fluorescent material 232 is formed separately from the color filter layer 230 , the process may be simplified.

Next, the light efficiency of the organic light emitting display device according to an embodiment of the present invention will be described with reference to FIGS. 3 and 4 . 3 is a graph comparing light efficiencies in a red sub-pixel region according to a comparative example and an embodiment. 4 is a graph comparing light efficiency in a green sub-pixel area according to a comparative example and an embodiment.

In order to compare the optical efficiency of the comparative example and the example, light having a wavelength of 380 nm to 490 nm is irradiated to the color filter array substrate of the comparative example and the example. In addition, the embodiment according to the present invention includes various contents of the fluorescent material. The fluorescent substance contains 3 wt%, 4.5 wt%, 6 wt%, and 8 wt%, respectively. At this time, in order to accelerate the reaction, the light efficiency was measured at a temperature of 150 ^o C.

Referring to FIG. 3 , it can be seen that the light efficiency in the red sub-pixel area in the organic light emitting display device according to the embodiments is higher than the light efficiency in the red sub-pixel area in the organic light emitting display device according to the comparative example. there is.

In detail, it can be seen that the peak of the embodiment including the fluorescent material is higher at a wavelength of about 630 nm that emits red light. That is, it can be seen that the fluorescent material disposed on the red color filter pattern emits red light in response to a wavelength of 380 nm to 490 nm. At this time, it can be observed that the light efficiency according to the examples is 10% to 31.5% higher than the light efficiency according to the comparative example.

In addition, referring to FIG. 4 , it is shown that the light efficiency in the green sub-pixel area in the organic light emitting display device according to the embodiments is higher than the light efficiency in the green sub-pixel area in the organic light emitting diode display according to the comparative example. Able to know.

In detail, it can be seen that the peak of the embodiment including the fluorescent material is higher at a wavelength of about 550 nm that emits green light. That is, it can be seen that the fluorescent material disposed on the green color filter pattern emits green light in response to a wavelength of 380 nm to 490 nm. At this time, it can be observed that the light efficiency according to the examples is 20% to 34.8% higher than the light efficiency according to the comparative example.

That is, the organic light emitting display device according to the present invention has a higher light efficiency than the organic light emitting display device according to the comparative example because the fluorescent material is disposed on the red, green, and blue color filter patterns.

Those skilled in the art from the above description will be able to see that various changes and modifications are possible without departing from the technical spirit of the present invention. Accordingly, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

200: second substrate 210: black matrix
211: barrier rib 230: color filter layer
240: overcoat layer

Claims (20)

Board;
a black matrix disposed on the substrate and defining a sub-pixel area;
barrier ribs disposed on the black matrix;
a color filter layer disposed in the sub-pixel area; and
and an overcoat layer disposed on the color filter layer and the partition wall to cover the partition wall, wherein the overcoat layer further includes a fluorescent material layer,
The fluorescent material layer includes the same fluorescent material as the color filter layer, and is formed integrally with the overcoat layer.
The method of claim 1,
The overcoat layer is a color filter array substrate comprising at least one solvent in which the fluorescent material is dissolved.
3. The method of claim 2,
The solvent is propylene glycol methyl ether acetate, 3-methoxybutyl acetate, dipropylene glycol monomethyl ether, 3-methoxy-1-butanol (3-methoxy-1-butanol), propylene glycol monomethyl ether, ethyl 3-ethoxy propionate, methyl-3-methoxy propionate (methyl- 3-methoxy propionate), diethylene glycol butyl methyl ether, diethylene glycol ethylmethyl ether, 1-ethoxy-2-propanol (1-ethoxy-2-propanol) , cyclohexanone (cyclohexanone), ethylene glycol dimethyl ether (ethylene glycol dimethyl ether) and diethylene glycol diethyl ether (diethylene glycol diethyl ether), characterized in that selected from the group consisting of color filter array substrate.
3. The method of claim 2,
The fluorescent material is a color filter array substrate, characterized in that it comprises a substituent selectively dissolved in the overcoat layer.
5. The method of claim 4,
The fluorescent material is a color filter array substrate comprising an alkyl group or an amine group.
3. The method of claim 2,
The fluorescent material is a color filter array substrate, characterized in that the fluorescent dye or quantum dots (quantum dots).
3. The method of claim 2,
The color filter array substrate, characterized in that the fluorescent material has an absorption wavelength of 380 nm to 490 nm.
The method of claim 1,
The color filter layer includes a red color filter pattern, a green color filter pattern, and a blue color filter pattern,
A color filter array substrate, wherein a red fluorescent material, a green fluorescent material, and a blue fluorescent material are respectively disposed on the red color filter pattern, the green color filter pattern, and the blue color filter pattern.
The method of claim 1,
The color filter array substrate, characterized in that the width of the barrier rib is smaller than the width of the black matrix.
The method of claim 1,
The color filter array substrate, characterized in that the height of the upper surface of the barrier rib is higher than the height of the upper surface of the color filter layer.
thin film transistor array substrate; and
a color filter array substrate according to any one of claims 1 to 10, disposed to face the thin film transistor array substrate;
An organic light emitting display device comprising a.
disposing a black matrix defining a sub-pixel area on one surface of a substrate;
disposing a barrier rib on the black matrix
disposing a color filter layer including a fluorescent material in the sub-pixel area; and
disposing an overcoat layer on the substrate including the black matrix, the barrier ribs and the color filter layer;
Including; dissolving the fluorescent material into an overcoat layer;
In the disposing of the overcoat layer, the color filter array substrate manufacturing method, characterized in that the overcoat layer is disposed on the color filter layer and the partition wall to cover the partition wall.
13. The method of claim 12,
The color filter array substrate manufacturing method, characterized in that the height of the upper surface of the barrier rib is made higher than the height of the upper surface of the color filter layer.
13. The method of claim 12,
The method of manufacturing a color filter array substrate, characterized in that the fluorescent material has an absorption wavelength of 380 nm to 490 nm.
13. The method of claim 12,
The color filter layer including the fluorescent material includes a red color filter pattern, a green color filter pattern, and a blue color filter pattern,
The red color filter pattern, the green color filter pattern, and the blue color filter pattern each include a red fluorescent material, a green fluorescent material, and a blue fluorescent material.
13. The method of claim 12,
The overcoat layer is a method of manufacturing a color filter array substrate, characterized in that it contains one or more solvents in which the fluorescent material is dissolved.
17. The method of claim 16,
The solvent is propylene glycol methyl ether acetate, 3-methoxybutyl acetate, dipropylene glycol monomethyl ether, 3-methoxy-1-butanol (3-methoxy-1-butanol), propylene glycol monomethyl ether, ethyl 3-ethoxy propionate, methyl-3-methoxy propionate (methyl- 3-methoxy propionate), diethylene glycol butyl methyl ether, diethylene glycol ethylmethyl ether, 1-ethoxy-2-propanol (1-ethoxy-2-propanol) , cyclohexanone (cyclohexanone), ethylene glycol dimethyl ether (ethylene glycol dimethyl ether) and diethylene glycol diethyl ether (diethylene glycol diethyl ether), characterized in that selected from the group consisting of a color filter array substrate manufacturing method.
13. The method of claim 12,
The method for manufacturing a color filter array substrate, characterized in that the fluorescent material includes a substituent selectively soluble in the overcoat layer.
19. The method of claim 18,
The method for manufacturing a color filter array substrate, characterized in that the fluorescent material includes an alkyl group or an amine group.
13. The method of claim 12,
The fluorescent material is a color filter array substrate manufacturing method, characterized in that the fluorescent dye or quantum dots (quantum dots).

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