KR102431372B1 - Color Filter Array Substrate And Organic Light Emitting Diode Display Device Including The Same - Google Patents

Abstract

The present invention discloses a color filter array substrate and an organic light emitting display device including the same. The disclosed color filter array substrate of the present invention and an organic electroluminescence display including the same include an anti-reflection film, an optical pressure-sensitive adhesive layer disposed on one surface of the anti-reflection film, a substrate disposed on the optical pressure-sensitive adhesive layer, and disposed on the substrate a first overcoat layer, a color filter layer disposed on the first overcoat layer and comprising red, green, blue and color layers, and a second overcoat layer disposed on the color filter layer, the color layer and the color layer A pigment or dye is included in at least one region of the optical pressure-sensitive adhesive layer, the first overcoat layer, or the second overcoat layer region corresponding to the region overlapping the region.

Description

Color Filter Array Substrate And Organic Light Emitting Diode Display Device Including The Same

The present invention relates to a color filter array substrate and an organic light emitting display device including the same, and more particularly, to a color filter array substrate capable of improving black color and reducing reflectance, and an organic light emitting display including the same It's about the device.

As the information society develops, the demand for a display device for displaying an image is increasing in various forms. Recently, a liquid crystal display device (LCD), a plasma display panel device (PDP), Various flat panel display devices such as an organic light emitting diode display device (OLED) are being utilized.

Among such display devices, since the organic light emitting display device uses a self-luminous device, a backlight used in a liquid crystal display device using a non-light emitting device is not required, so that it can be lightweight and thin. In addition, the organic light emitting display device has better viewing angle and contrast ratio than the liquid crystal display device, and is advantageous in terms of power consumption. In addition, the organic light emitting display device can be driven at a low DC voltage, has a fast response speed, is strong against external shocks because the internal components are solid, has a wide operating temperature range, and is particularly inexpensive in terms of manufacturing cost. .

Such an organic light emitting display device displays an image in the form of a top emission method or a bottom emission method according to the structure of an organic light emitting device including a first electrode, a second electrode, and an organic light emitting layer. . The bottom emission method displays visible light generated from the organic light emitting layer toward the lower side of the substrate on which the TFT is formed, whereas the top emission method displays visible light generated from the organic light emitting layer toward the upper side of the substrate on which the TFT is formed.

On the other hand, the organic light emitting display device is provided with a circularly polarizing plate, thereby realizing the black color of the organic light emitting display device and reducing external light reflection to improve visibility. However, when the organic light emitting display device uses a circularly polarizing plate, transmittance is reduced, thereby reducing panel efficiency and increasing power consumption.

In order to solve this problem, an organic light emitting display device having a configuration in which a circular polarizing plate is removed has been proposed, and in order to reduce the reflectance of the organic light emitting display device, a sky blue (sky) color filter is disposed in an area where a white color filter is disposed. blue) color filter is disposed, but there is a problem in that a bluish color appears when the organic light emitting display device is in a black state.

Accordingly, there is a need for a method for improving the black color of an organic light emitting display device that does not use a circular polarizer.

The present invention is to solve the above problems, and a color filter array substrate capable of further reducing the reflectance of the organic light emitting display device while improving black color in an organic light emitting display device that does not use a circular polarizer, and the same An object of the present invention is to provide an organic light emitting display device including

The color filter array substrate of the present invention for solving the problems of the prior art as described above and an organic electroluminescence display including the same are provided on an anti-reflection film, an optical adhesive layer disposed on one surface of the anti-reflection film, and on the optical adhesive layer a substrate disposed on the substrate and divided into red, green, blue and white sub-pixel regions, a first overcoat layer disposed on the substrate, and a color filter layer disposed on the first overcoat layer and comprising red, green, blue and color layers and a second overcoat layer disposed on the color filter layer, wherein at least one of the color layer, an optical pressure-sensitive adhesive layer region corresponding to a region overlapping the color layer region, a first overcoat layer region, or a second overcoat layer region A pigment or dye is included in one region.

Here, when the display device is in a black state, the pigment or dye absorbs light of a visible light wavelength of 400 nm to 500 nm in a white sub-pixel region to lower light transmittance of a wavelength of 400 nm to 500 nm. can be In addition, the pigment may be a pigment or dye capable of lowering the light transmittance of the visible light wavelength of 500 nm to 600 nm or the light transmittance of the visible light wavelength of 600 nm to 700 nm.

The color filter array substrate and the organic light emitting display device including the same according to the present invention do not include a circular polarizer, but a color layer disposed to correspond to a white sub-pixel region, and an optical adhesive corresponding to a region overlapping the color layer region By providing a pigment or dye in at least one of the layer region, the first overcoat layer region, or the second overcoat layer region, light in an unnecessary wavelength band is blocked to improve the black color of the organic light emitting display device and minimize the reflectance. there is an effect

1A and 1B are views illustrating a color filter array substrate according to a first embodiment of the present invention.
2A and 2B are diagrams illustrating a color filter array substrate according to a second embodiment of the present invention.
3A and 3B are diagrams illustrating a color filter array substrate according to a third embodiment of the present invention.
4A and 4B are views illustrating a color filter array substrate according to a fourth embodiment of the present invention.
5 is a cross-sectional view illustrating an organic light emitting display device including a color filter array substrate according to a first embodiment of the present invention.
6 is a table comparing reflectance and color coordinates of a display device using a color filter array substrate according to a comparative example and a color filter array substrate according to the first embodiment of the present invention.
7 is a table comparing reflectance and color coordinates of a comparative example and an optical pressure-sensitive adhesive layer according to a second embodiment of the present invention.
8A to 8C are graphs showing transmittance of an optical pressure-sensitive adhesive layer according to a second embodiment of the present invention.

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 shapes. And in the drawings, the size and thickness of the device may be exaggerated for convenience. Like reference numerals refer to like elements throughout.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different shapes, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout. The sizes and relative sizes of layers and regions in the drawings may be exaggerated for clarity of description.

Reference to an element or layer to another element or “on” or “on” includes not only directly on the other element or layer, but also with other layers or other elements interposed therebetween. do. On the other hand, reference to an element "directly on" or "directly on" indicates that there are no intervening elements or layers.

The spatially relative terms "below, beneath", "lower", "above", "upper", etc. are one element or component as shown in the drawings. and can be used to easily describe the correlation with other devices or components. Spatially relative terms should be understood as terms including different directions of the device during use or operation in addition to the directions shown in the drawings. For example, when an element shown in the figures is turned over, an element described as "beneath" or "beneath" another element may be placed "above" the other element. Accordingly, the exemplary term “below” may include both directions below and above.

The terminology used herein is for the purpose of describing the embodiments, and thus is not intended to limit the present invention. In this specification, the singular also includes the plural, unless specifically stated otherwise in the phrase. As used herein, “comprise” and/or “comprising” refers to the presence of one or more other components, steps, operations and/or elements mentioned. or addition is not excluded.

1A and 1B are views illustrating a color filter array substrate according to a first embodiment of the present invention. 1A and 1B , the color filter array substrate according to the first embodiment of the present invention includes an anti-reflection film 120 , an optical adhesive layer 110 , a substrate 100 , a color filter layer 140 , and an overcoat layer. (131). An optical adhesive layer 110 is disposed on one surface of the anti-reflection film 120 , a substrate 100 is disposed on the optical adhesive layer 110 , and a color filter layer 140 is disposed on the substrate 100 , and , an overcoat layer 131 is disposed on the color filter layer 140 . However, an overcoat layer 130 may be further disposed on the substrate 100 and the color filter layer 140 . In addition, in the embodiments to be described later, a configuration in which the overcoat layer 130 is disposed on the substrate 100 will be mainly described, but the present invention is not limited thereto. That is, the present invention can be applied even when the overcoat layer 130 disposed on the substrate 100 is not disposed.

In detail, the optical adhesive layer 110 is disposed on one surface of the anti-reflection film 120 , and the substrate 100 is disposed on the optical adhesive layer 110 . Here, the anti-reflection film 120 may minimize reflection of light incident on the display panel and improve transmittance.

In addition, the optical pressure-sensitive adhesive layer 110 may be an adhesive having excellent optical properties by adhering the anti-reflection film 120 and the substrate 100 and at the same time having high transmittance and transparency. Here, the optical adhesive layer 110 may be a color change optically clear adhesive (CC-OCA) or a specific wavelength transmittance control optically clear adhesive (STC-OCA). Since the optical pressure-sensitive adhesive layer 110 is made of CC-OCA or STC-OCA, it is possible to reduce the reflectance of the optical pressure-sensitive adhesive layer 110 in the visible light region. In detail, the optical pressure-sensitive adhesive layer 110 may have a transmittance of 60% to 100% in a visible ray region.

A first overcoat layer 130 is disposed on the substrate 100 , and a color filter layer 140 is disposed on the second overcoat layer 130 . The color filter layer 140 includes a red color filter 141 , a green color filter 142 , a blue color filter 143 , and a color layer 144 .

A plurality of black matrices 160 are disposed on the color filter layer 140 . The black matrix 160 may be disposed on a boundary between different color filters. Here, the black matrix 160 may define a sub-pixel area. The sub-pixel area defined by the black matrix 160 may be a red sub-pixel area, a green sub-pixel area, a blue sub-pixel area, and a white sub-pixel area. That is, the area where the red color filter 141 is disposed is a red sub-pixel area, the area where the green color filter 142 is disposed is a green sub-pixel area, and the area where the blue color filter 143 is disposed is a blue sub-pixel area. and an area in which the color layer 144 is disposed may correspond to a white sub-pixel area.

Accordingly, red light is emitted from the area where the red color filter 141 is disposed, green light is emitted from the area where the green color filter 142 is disposed, and the area where the blue color filter 143 is disposed. Blue light may be emitted, and white light may be emitted from a region where the color layer 144 is disposed.

Here, the color layer 144 may be formed of a color including a combination of red, green, blue, or white. Also, the height of the color layer 144 may be lower than the height of the red color filter 141 , the green color filter 142 , and the blue color filter 143 disposed in the red, green, and blue sub-pixel areas. Accordingly, the color of the color layer 144 may not be recognized in the white sub-pixel area.

Here, since the color layer 144 is disposed in an area corresponding to the white sub-pixel area, it is possible to reduce the reflectance of the display device using the color filter array substrate including the color layer 144 . In detail, by disposing the color layer 144 to correspond to the white sub-pixel region, color reproducibility and light efficiency are increased, so that even if the color filter array substrate does not include a circular polarizer, the reflectance can be further reduced. have.

In addition, the arrangement area of the black matrix 160 is not limited thereto, and a plurality of black matrices 160 may be spaced apart from each other on the substrate 100 . An opening may be formed between the black matrix 160 and another black matrix 160 spaced apart from the black matrix 160 , and the color filter layer 140 may be disposed on the opening.

However, since the color layer 144 is disposed in an area corresponding to the white sub-pixel area, when a display device using a color filter array substrate including the same is in a black state, the color of black is bluish. ), the black color of the display device can be improved and the reflectance can be further reduced through the color filter array substrate, which will be described later.

Specifically, the color layer 144 may include a pigment 150 . When the color layer 144 includes the pigment 150 , it is possible to improve the black color of the display device and reduce the reflectance. In this case, the color layer 144 may include a dye instead of the pigment 150 .

In detail, the pigment 150 may be a pigment 150 that absorbs light having a wavelength of 400 nm to 500 nm of visible light in the white sub-pixel region. Through this, by lowering the light transmittance of a wavelength of 400 nm to 500 nm, when the display device is in a black state, a bluish characteristic may be improved. In addition, since the color layer 144 including the pigment 150 or dye is disposed in the white sub-pixel region of the substrate 100 , it is possible to improve the reflectance by controlling the transmittance of a specific wavelength.

Here, the pigment 150 may be composed of a combination of C.I pigment (Color Index pigment) Red 177 and C.I pigment Yellow 139, or a combination of C.I pigment Green 7 and C.I pigment Yellow 185. In addition, when a dye is included in the color layer 144, the dye may be V23 or Vdye, through which the dye absorbs light of a visible light wavelength of 400 nm to 500 nm in the white sub-pixel region, It is possible to lower the light transmittance of the wavelength of 400 nm to 500 nm.

Also, the pigment 150 may be a pigment 150 that absorbs light having a wavelength of 500 nm to 600 nm. Through this, by lowering the light transmittance of the wavelength of 500 nm to 600 nm, when the display device is in a black state, a greenish characteristic may be improved and external light reflection may be reduced. Here, the pigment 150 may be configured by combining C.I pigment Red 177, C.I pigment Yellow 139, and C.I pigment Blue 15:6, but is not limited thereto.

Also, the pigment 150 is not limited thereto, and may be a pigment 150 that absorbs light having a wavelength of 600 nm to 700 nm of visible light. Through this, by lowering the light transmittance of 600 nm to 700 nm wavelength, reddish characteristics can be improved when the display device is in a black state, and external light reflection can be reduced. Here, the pigment 150 may be configured by combining C.I pigment Green 7, C.I pigment Yellow 185, and C.I pigment Blue 15:6, but is not limited thereto.

In addition, the color layer 144 lowers the light transmittance of the visible light wavelength of 400 nm to 500 nm in order to improve all of the bluish, reddish, and greenish characteristics of the display device. It may include a dye or pigment 150 capable of lowering the light transmittance of a visible light wavelength of 500 nm to 600 nm, and lowering the light transmittance of a visible light wavelength of 600 nm to 700 nm.

The height of the color layer 144 including the pigment 150 may be equal to or lower than the height of the red color filter 141 , the green color filter 142 , and the blue color filter 143 . Through this, it is possible to reduce the reflectance of the display device using the color filter array substrate including the color layer 144 in which the pigment 150 is inserted. A second overcoat layer 131 is disposed on the substrate 100 including the color filter layer 140 and the black matrix 160 .

Since the color layer 144 of the color filter layer 140 of the color filter array substrate according to the first embodiment of the present invention includes the pigment 150, the effect of improving the black color of the display device and reducing the reflectance is achieved. have.

Next, a detailed review of the color filter array substrate according to the second embodiment of the present invention with reference to FIGS. 2A and 2B is as follows. 2A and 2B are diagrams illustrating a color filter array substrate according to a second embodiment of the present invention. The color filter array substrate according to the second embodiment of the present invention may include the same components as those of the above-described embodiment. A description that overlaps with the above-described embodiment may be omitted. Also, the same components have the same reference numerals.

2A and 2B , the color filter array substrate according to the second embodiment of the present invention includes an anti-reflection film 120 , an optical adhesive layer 111 , a substrate 100 , a first overcoat layer 130 , It includes a color filter layer 140 , a black matrix 160 , and a second overcoat layer 131 . Here, the optical adhesive layer 111 may be a color change optically clear adhesive (CC-OCA) or a specific wavelength transmittance control optically clear adhesive (STC-OCA).

In addition, the optical adhesive layer 111 may be divided into a first optical adhesive layer region 112 and a second optical adhesive layer region 113 . In addition, the color filter layer 140 is disposed to correspond to a red color filter 141 disposed to correspond to a red sub-pixel area, a green color filter 142 disposed to correspond to a green sub-pixel area, and to correspond to a blue sub-pixel area. It may include a blue color filter 143 and a color layer 144 disposed to correspond to the white sub-pixel area.

In this case, the first optical adhesive layer region 112 may be defined as a region overlapping the color layer 144 , and the second optical adhesive layer region 113 may have the red, green, and blue colors. It may be defined as an area overlapping the filters 141 , 142 , and 143 . Here, the first optical adhesive layer region 112 may include a pigment 151 . That is, the first optical pressure-sensitive adhesive layer region 112 including the pigment 151 may be disposed to correspond to the white sub-pixel region.

The pigment 151 lowers the light transmittance of the visible light wavelength of 400 nm to 500 nm, lowers the light transmittance of the visible light wavelength of 500 nm to 600 nm, or the light transmittance of the visible light wavelength of 600 nm to 700 nm It may be a pigment 151 that can be lowered. In this case, the first optical adhesive layer region 112 may include a dye instead of the pigment 151 .

In addition, the present invention is not limited thereto, and the pigment 152 or dye may be included in the first optical adhesive layer region 112 and the second optical adhesive layer region 113 (see FIG. 2B ).

In this way, by including the pigment 151 in the first optical pressure-sensitive adhesive layer region 112 disposed in the region corresponding to the color layer 144, the color filter array substrate having the color layer 144 is formed. When the used display device is in a black state, there is an effect of improving black color and reducing reflectance. In detail, by including the pigment 151 in the first optical pressure-sensitive adhesive layer region 112 , it is possible to improve black color of the display device and reduce external light reflection by controlling the transmittance of an unnecessary specific wavelength.

Next, a detailed review of the color filter array substrate according to the third embodiment of the present invention with reference to FIGS. 3A and 3B is as follows. 3A and 3B are diagrams illustrating a color filter array substrate according to a third embodiment of the present invention. The color filter array substrate according to the third embodiment of the present invention may include the same components as those of the above-described embodiments. A description that overlaps with the above-described embodiments may be omitted. Also, the same components have the same reference numerals.

3A and 3B , the color filter array substrate according to the third embodiment of the present invention includes an anti-reflection film 120 , an optical adhesive layer 110 , a substrate 100 , a first overcoat layer 133 , It includes a color filter layer 140 , a black matrix 160 , and a second overcoat layer 131 . Here, the first overcoat layer 133 may include a first region 134 and a second region 135 .

In addition, the color filter layer 140 is disposed to correspond to a red color filter 141 disposed to correspond to a red sub-pixel area, a green color filter 142 disposed to correspond to a green sub-pixel area, and to correspond to a blue sub-pixel area. It may include a blue color filter 143 and a color layer 144 disposed to correspond to the white sub-pixel area.

In this case, the first region 134 may be defined as a region disposed to overlap the color layer 144 , and the second region 135 may overlap the red, green, and blue color filters 141 , 142 , and 143 . It may be defined as an area to be arranged. Here, the first region 134 may include a pigment 152 . That is, the first region 134 including the pigment 152 may be disposed to correspond to the white sub-pixel region.

The pigment 152 may be a pigment 152 capable of lowering light transmittance of a visible light wavelength of 400 nm to 500 nm in the white sub-pixel region when the display device is in a black state. However, the pigment 152 is not limited thereto, and may be a pigment 152 capable of lowering the light transmittance of the visible light wavelength of 500 nm to 600 nm or the light transmittance of the visible light wavelength of 600 nm to 700 nm. have.

In this case, the first region 134 may include a dye instead of the pigment 152 . Also, the pigment 152 or the dye may be included in the first region 134 and the second region 135 (refer to FIG. 3B ).

In this way, the first region 134 including the pigment 152 is arranged to correspond to the white sub-pixel region, so that, when the display device is in a black state, unnecessary specific wavelength transmittance is controlled to increase the black color of the display device. It can improve and reduce external light reflection.

Next, a detailed review of the color filter array substrate according to the fourth embodiment of the present invention with reference to FIGS. 4A and 4B is as follows. 4A and 4B are diagrams illustrating a color filter array substrate according to a fourth embodiment of the present invention. The color filter array substrate according to the fourth embodiment of the present invention may include the same components as those of the above-described embodiments. A description that overlaps with the above-described embodiments may be omitted. Also, the same components have the same reference numerals.

4A and 4B , the color filter array substrate according to the fourth embodiment of the present invention includes an anti-reflection film 120 , an optical adhesive layer 110 , a substrate 100 , a first overcoat layer 130 , and a color It includes a filter layer 140 , a black matrix 160 , and a second overcoat layer 136 . Here, the second overcoat layer 136 may planarize the substrate 100 on which the color filter layer 140 and the black matrix 160 are disposed, and the second overcoat layer 136 may include a third region 137 . ) and a fourth region 138 .

In addition, the color filter layer 140 includes a red color filter 141 disposed to correspond to a red sub-pixel area, a green color filter 142 disposed to correspond to a green sub-pixel area, and a blue sub-pixel area to correspond to. It may include a blue color filter 143 and a color layer 144 disposed to correspond to the white sub-pixel area.

In this case, the third area 137 may be defined as an area overlapping the color layer 144 , and the fourth area 138 overlaps the red, green, and blue color filters 141 , 142 , and 143 . It can be defined as an area in which it is arranged. Here, the third region 137 may include a pigment 153 . That is, the third region 137 including the pigment 153 may be disposed to correspond to the white sub-pixel region.

The pigment 153 lowers the light transmittance of the visible light wavelength of 400 nm to 500 nm or the light transmittance of the visible light wavelength of 500 nm to 600 nm in the white sub-pixel region when the display device is in a black state, It may be a pigment 153 capable of lowering the light transmittance of the visible light wavelength of 600 nm to 700 nm.

However, the third region 137 may include a dye instead of the pigment 153 . Also, the pigment 153 or the dye may be included in the third region 137 and the fourth region 138 (refer to FIG. 4B ).

As described above, the third region 137 including the pigment 153 is arranged to correspond to the white sub-pixel region, so that, when the display device is in a black state, unnecessary specific wavelength transmittance is controlled to increase the black color of the display device. It has the effect of improving and reducing external light reflection.

Next, the organic light emitting display device including the color filter array substrate according to the first embodiment of the present invention will be reviewed in detail with reference to FIG. 5 . 5 shows only the organic light emitting display device including the color filter array substrate according to the first embodiment of the present invention, but the organic light emitting display device of the present invention is not limited thereto. The color filter array substrate according to the fourth embodiment may be included.

5 is a cross-sectional view illustrating an organic light emitting display device including a color filter array substrate according to a first embodiment of the present invention. Referring to FIG. 5 , an organic light emitting display device including a color filter array substrate according to a first embodiment of the present invention includes a first substrate 100 including a color filter layer 140 and the first substrate 100 . and a second substrate 200 disposed to face the second substrate 200 and having a plurality of sub-pixel regions.

The second substrate 200 includes a plurality of sub-pixel regions defined by crossing a data line and a gate line. The sub-pixel area may include a red sub-pixel area, a green sub-pixel area, a blue sub-pixel area, and a white sub-pixel area. The sub-pixel region includes a driving unit and a pixel unit, a thin film transistor Tr is disposed in the driving unit, and an organic light emitting diode 212 is disposed in the pixel unit.

In detail, a thin film transistor Tr including a gate electrode 201 , an active layer 203 , a source electrode 204 , and a drain electrode 205 is disposed on the second substrate 200 . In addition, an organic light emitting diode 212 electrically connected to the thin film transistor Tr and including a first electrode 208 , an organic light emitting layer 210 and a second electrode 211 is disposed.

In more detail, a gate electrode 201 is disposed on the second substrate 200 , a gate insulating layer 202 disposed on the gate electrode 201 , and the gate electrode 201 disposed on the gate insulating layer 202 . ), the active layer 203 is disposed to overlap, and the source electrode 204 and the drain electrode 205 are disposed to be spaced apart from each other on the active layer 203 .

Here, the gate electrode 201, the source electrode 204, and the drain electrode 205 are copper (Cu), molybdenum (Mo), aluminum (Al), silver (Ag), titanium (Ti), and tantalum (Ta). Or it may be an alloy constructed from a combination thereof. Also, in some cases, the gate electrode 201 , the source electrode 204 , and the drain electrode 205 may be formed by stacking at least two or more metal layers, but is not limited thereto. In addition, the active layer 203 may be formed of an oxide semiconductor layer or an a-Si layer, but is not limited thereto.

As described above, the thin film transistor Tr is disposed on the second substrate 200 , and the thin film transistor Tr may be disposed in each sub-pixel region of the second substrate 200 .

In addition, an interlayer insulating layer 206 and a planarization layer 207 are disposed on the second substrate 200 including the thin film transistor Tr. A contact hole exposing the drain electrode 205 of the thin film transistor Tr is formed in the interlayer insulating layer 206 and the planarization layer 207 . In addition, the first electrode 208 of the organic light emitting diode 212 connected to the drain electrode 205 exposed by the contact hole is disposed on the planarization layer 207 .

Here, the first electrode 208 of the organic light emitting diode 212 may be formed of a single layer or a multilayer, and although not shown in the drawing, a reflective layer may be further included under the first electrode 208 . . A planarization layer 207 on which the first electrode 208 is disposed and a bank pattern 209 defining a light-emitting area and a non-emission area of the second substrate 200 are formed on a portion of the upper surface of the first electrode 208 . this is placed

An organic light emitting layer 210 is disposed on the upper surface of the first electrode 208 of the organic light emitting device 212 disposed in the light emitting region. The organic light emitting layer 210 may be composed of a single layer made of a light emitting material.

In addition, the organic light emitting layer 210 includes a hole injection layer (HIL), a hole transport layer (HTL), an emitting layer (Emitting Material Layer; EML), an electron transporting layer in order to increase luminous efficiency. ) and may be composed of a multilayer of an electron injection layer.

The second electrode 211 of the organic light emitting device 212 is disposed on the second substrate 200 on which the organic light emitting layer 210 is disposed. As described above, the organic electroluminescent device 212 is disposed on the second substrate 200 , and the organic electroluminescent device 212 is disposed in each sub-pixel region of the second substrate 200 , and the thin film transistor (Tr) can be connected. Also, although not shown in the drawings, an encapsulation layer for protecting the organic light emitting diode 212 from oxygen and moisture may be further disposed on the second electrode 211 of the organic light emitting diode 212 .

The first substrate 100 of the organic light emitting display device may be disposed to face the second substrate 200 . An optical adhesive layer 110 is disposed on one surface of the first substrate 100 , and an anti-reflection film 120 is disposed on the optical adhesive layer 110 . A first overcoat layer 130 , a color filter layer 140 , a black matrix 160 , and a second overcoat layer 131 are sequentially disposed on the other surface of the first substrate 100 .

Here, the optical adhesive layer 111 may be a color change optically clear adhesive (CC-OCA) or a specific wavelength transmittance control optically clear adhesive (STC-OCA). In addition, the color filter layer 140 includes a red color filter 141 , a green color filter 142 , a blue color filter 143 , and a color layer 144 .

In this case, the red color filter 141 is disposed to correspond to the red sub-pixel area, the green color filter 142 is disposed to correspond to the green sub-pixel area, and the blue color filter 143 is disposed to correspond to the blue sub-pixel area. It is disposed to correspond to the area, and the color layer 144 is disposed to correspond to the white sub-pixel area.

The color layer 144 may include a pigment 150 . The pigment 150 may absorb light of a visible light wavelength of 400 nm to 500 nm, absorb light of a visible light wavelength of 500 nm to 600 nm, or absorb light of a visible light wavelength of 600 nm to 700 nm There may be a pigment 150 . In this case, the color layer 144 may include a dye instead of the pigment 150 .

As described above, the first substrate 100 including the color filter layer 140 and the second substrate 200 including the thin film transistor Tr and the organic light emitting diode 212 are bonded to each other through the resin 230 . can be

However, although FIG. 5 of the present invention discloses a configuration in which the pigment 150 is included only in the color layer 144, the present invention is not limited thereto, and the color layer 144, the white sub-pixel region and The pigment 150 may be included in at least one region of the overlapping optical pressure-sensitive adhesive layer 111 , the first overcoat layer 130 , or the second overcoat layer 131 . At this time, the color layer 144, the optical pressure-sensitive adhesive layer 111, the first overcoat layer 130 or the second overcoat layer 131 disposed in the region overlapping the white sub-pixel region are the pigment 150. Instead, dyes may be included.

In addition, at least one of the red, green and blue sub-pixel regions and the region of the optical pressure-sensitive adhesive layer 110 , the first overcoat layer 130 , or the second overcoat layer 131 region is a pigment 150 . Or it may further include a dye. Through this, the reflectance of the organic light emitting display device may be further reduced.

Even if the organic light emitting display device including the color filter array substrate according to the first embodiment of the present invention does not include the circular polarizer, the reflectance may be reduced due to the color layer 144 including the pigment 150 . In addition, since the color layer 144 includes the pigment 150, it is possible to block light in an unnecessary wavelength band, thereby improving the image quality and luminance of an organic light emitting display device not having a circular polarizer, and minimizing the reflectance. have. Also, when the organic light emitting display device includes the color filter array substrate according to the second to fourth embodiments of the present invention, the same effect may be obtained.

Next, with reference to FIG. 6 , reflectance and color coordinates of a display device using a color filter array substrate according to a comparative example and a first embodiment of the present invention will be described as follows. 6 is a table comparing reflectance and color coordinates of a display device using a color filter array substrate according to a comparative example and a first embodiment of the present invention. On the other hand, the color filter array substrate of the display device according to the comparative example is configured such that a pigment is not included in the color filter disposed to correspond to the white sub-pixel area.

Referring to FIG. 6 , it can be seen that the reflectance of the display device using the color filter array substrate according to the first embodiment of the present invention is 9.9%, which is lower than the reflectance of the display device according to the comparative example of 13%.

In addition, the color gamut of the display device using the color filter array substrate according to the first embodiment of the present invention and the display device according to the comparative example are compared through the CIE1976 color coordinate system as follows. The color coordinates (a*, b*) of the white light for the display device using the color filter array substrate according to the first embodiment of the present invention are expressed as (1.6, -2.5), and the color coordinates of the white light for the display device according to the comparative example. It can be seen that (a*, b*) is expressed as (-7.6, -7.5). That is, it can be seen that the display device using the color filter array substrate according to the first embodiment of the present invention has improved bluish characteristics than the display device according to the comparative example.

Next, referring to FIG. 7 , the reflectance and color coordinates of the optical pressure-sensitive adhesive layer according to the comparative example and the second embodiment of the present invention are as follows. 7 is a table comparing reflectance and color coordinates of a comparative example and an optical pressure-sensitive adhesive layer according to a second embodiment of the present invention. On the other hand, the optical adhesive layer according to the comparative example is CC-OCA, and the optical adhesive layer according to the second embodiment of the present invention is CC-OCA including a pigment.

Referring to FIG. 7 , it can be seen that the reflectance of the optical adhesive layer according to the second embodiment of the present invention is 9.7%, which is lower than the reflectance of the display device according to the comparative example of 13%.

In addition, the color reproducibility of the optical adhesive layer according to the second embodiment of the present invention and the optical adhesive layer according to the comparative example is compared through the CIE1976 color coordinate system as follows. The color coordinates (a*, b*) of white light for the optical pressure-sensitive adhesive layer according to the second embodiment of the present invention are expressed as (1.7, -3.1), and the color coordinates of white light for the optical pressure-sensitive adhesive layer according to the comparative example (a) It can be seen that *, b*) is expressed as (-7.6, -7.5). That is, it can be seen that the optical adhesive layer according to the first embodiment of the present invention has improved bluish properties than the optical adhesive layer according to the comparative example.

Next, the transmittance of the optical pressure-sensitive adhesive layer according to the second embodiment of the present invention will be examined with reference to FIGS. 8A to 8C . 8A to 8C are graphs showing transmittance of an optical pressure-sensitive adhesive layer according to a second embodiment of the present invention. On the other hand, the optical adhesive layer according to the second embodiment of the present invention is CC-OCA containing a pigment.

First, referring to FIG. 8a, the optical adhesive layer of the present invention contains a dye in which C.I pigment Green 7, C.I pigment Yellow 185 and C.I pigment Blue 15:6 are combined to improve reddish properties. . Through this, it can be seen that the transmittance of light having a wavelength of 600 nm to 700 nm is reduced. That is, it can be seen that the reddish characteristics can be improved through the optical pressure-sensitive adhesive layer including the dye as described above.

In addition, referring to FIG. 8b , the optical adhesive layer of the present invention includes a dye in which C.I pigment Red 177, C.I pigment Yellow 139 and C.I pigment Blue 15:6 are combined to improve greenish properties. have. Through this, it can be seen that the transmittance of light having a wavelength of 500 nm to 550 nm is reduced. In other words. It can be seen that the greenish characteristics can be improved through the optical pressure-sensitive adhesive layer including the dye as described above.

In addition, referring to FIG. 8c , the optical pressure-sensitive adhesive layer of the present invention includes a dye in which C.I pigmentRed 177 and C.I pigment Yellow 139 are combined to improve bluish properties. Through this, it can be seen that the transmittance of light having a wavelength of 400 nm to 500 nm is reduced. That is, it can be seen that the bluish characteristic can be improved through the optical pressure-sensitive adhesive layer including the dye as described above.

Features, structures, effects, etc. described in the above embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to one embodiment. Furthermore, features, structures, effects, etc. illustrated in each embodiment can be combined or modified for other embodiments by those of ordinary skill in the art to which the embodiments belong. Accordingly, the contents related to such combinations and modifications should be interpreted as being included in the scope of the present invention.

In addition, although the embodiments have been described above, these are merely examples and do not limit the present invention, and those of ordinary skill in the art to which the present invention pertains are exemplified above in a range that does not depart from the essential characteristics of the present embodiment. It can be seen that various modifications and applications that have not been made are possible. For example, each component specifically shown in the embodiments may be implemented by modification. And the differences related to these modifications and applications should be construed as being included in the scope of the present invention defined in the appended claims.

100: substrate
110: optical adhesive layer
120: anti-reflection film
130: first overcoat layer
131: second overcoat layer
140: color filter layer
150: pigment
160: black matrix

Claims (20)

anti-reflection film;
an optical pressure-sensitive adhesive layer disposed on one surface of the anti-reflection film;
a substrate disposed on the optical pressure-sensitive adhesive layer and divided into red, green, blue, and white sub-pixel regions;
a first overcoat layer disposed on the substrate;
a color filter layer disposed on the first overcoat layer and including a red color filter, a green color filter, a blue color filter, and a color layer; and
a second overcoat layer disposed on the color filter layer;
A color filter array substrate comprising a pigment or dye in at least one of an optical pressure-sensitive adhesive layer region, a first overcoat layer region, and a second overcoat layer region corresponding to a region overlapping the region on which the color layer is disposed.
The method of claim 1,
The color layer is made of a color consisting of a combination of red, green, blue or white,
A height of the color layer is lower than a height of the red, green, and blue color filters disposed on the red, green, and blue sub-pixel regions.
The method of claim 1,
The optical pressure-sensitive adhesive layer is a color change optically clear adhesive (CC-OCA) or a specific wavelength transmittance control optically clear adhesive (STC-OCA) color filter array substrate.
The method of claim 1,
The pigment or dye is a color filter array substrate that absorbs light having a wavelength of 400 nm to 500 nm.
The method of claim 1,
The pigment or dye is a color filter array substrate that absorbs light having a wavelength of 500 nm to 600 nm.
The method of claim 1,
The pigment or dye is a color filter array substrate that absorbs light having a wavelength of 600 nm to 700 nm.
The method of claim 1,
The optical pressure-sensitive adhesive layer includes a second optical pressure-sensitive adhesive layer area that is the remaining area except for the first optical pressure-sensitive adhesive layer area and the first optical pressure-sensitive adhesive layer area that is disposed to overlap the color layer,
The pigment or dye is disposed only in the region of the first optical adhesive layer, or the color filter array substrate is disposed on the first and second optical adhesive layers.
The method of claim 1,
The first overcoat layer includes a first area overlapping the color layer and a second area remaining except for the first area,
wherein the pigment or dye is disposed only in the first region or in the first and second regions.
The method of claim 1,
The second overcoat layer includes a third region overlapping the color layer and a fourth region excluding the third region,
wherein the pigment or dye is disposed only in the third region or in the third and fourth regions.
The method of claim 1,
A pigment or a pigment in at least one of the second optical adhesive layer region of the optical adhesive layer corresponding to the red, green and blue sub-pixel regions, the second region of the first overcoat layer, or the fourth region of the second overcoat layer A color filter array substrate further comprising a dye.
anti-reflection film;
an optical pressure-sensitive adhesive layer disposed on one surface of the anti-reflection film;
a first substrate disposed on the optical pressure-sensitive adhesive layer and divided into red, green, blue, and white sub-pixel regions;
a first overcoat layer disposed on the substrate;
a color filter layer disposed on the first overcoat layer and comprising red, green, blue and color layers;
a second overcoat layer disposed on the color filter layer;
a second substrate disposed to face the first substrate; and
and organic electroluminescent devices respectively disposed on the red, green, blue, and white sub-pixel regions of the second substrate;
A pigment or dye is included in at least one of an optical pressure-sensitive adhesive layer region, a first overcoat layer region, and a second overcoat layer region corresponding to a region overlapping the region on which the color layer is disposed.
12. The method of claim 11,
The color layer is made of a color consisting of a combination of red, green, blue or white,
The height of the color layer is lower than the height of the red, green, and blue color filters disposed on the red, green, and blue sub-pixel regions.
12. The method of claim 11,
The optical pressure-sensitive adhesive layer is a color change optically clear adhesive (CC-OCA) or a specific wavelength transmittance control optically clear adhesive (STC-OCA).
12. The method of claim 11,
The pigment or dye absorbs light having a wavelength of 400 nm to 500 nm.
12. The method of claim 11,
The pigment or dye absorbs light having a wavelength of 500 nm to 600 nm.
12. The method of claim 11,
The pigment or dye absorbs light having a wavelength of 600 nm to 700 nm.
12. The method of claim 11,
The optical pressure-sensitive adhesive layer includes a second optical pressure-sensitive adhesive layer area that is the remaining area except for the first optical pressure-sensitive adhesive layer area and the first optical pressure-sensitive adhesive layer area that is disposed to overlap the color layer,
The pigment or dye is disposed only in the region of the first optical adhesive layer, or is disposed on the first and second optical adhesive layers.
12. The method of claim 11,
The first overcoat layer includes a first area overlapping the color layer and a second area remaining except for the first area,
The pigment or dye is disposed only in the first region or in the first and second regions.
12. The method of claim 11,
The second overcoat layer includes a third region overlapping the color layer and a fourth region excluding the third region,
The pigment or dye is disposed only in the third region or in the third and fourth regions.
12. The method of claim 11,
A pigment or a pigment in at least one of the second optical adhesive layer region of the optical adhesive layer corresponding to the red, green and blue sub-pixel regions, the second region of the first overcoat layer, or the fourth region of the second overcoat layer An organic light emitting display device further comprising a dye.

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