KR101830612B1 - Organic light emitting display device - Google Patents

Abstract

The present invention relates to an organic light emitting diode (OLED) display device capable of improving the visibility of external light and reducing the total power consumption of light emitted from the organic light emitting layer by controlling the transmittance according to wavelengths.
A substrate including a first surface and a second surface opposite to the first surface, the substrate having a light emitting region and a non-light emitting region; A thin film transistor formed in a non-emission region of the first surface of the substrate; A first electrode layer formed on the thin film transistor; An organic light emitting layer formed on the first electrode layer; A second electrode layer formed on the organic light emitting layer; A light blocking layer formed on the second surface of the substrate, the light blocking layer including a transparent substrate and a black pattern formed inside the transparent substrate; And a polarizing layer formed on the light blocking layer.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an organic light-

The present invention relates to an organic light emitting diode (OLED) display device capable of improving the visibility of external light and reducing the total power consumption of light emitted from the organic light emitting layer by controlling the transmittance of each wavelength of light.

2. Description of the Related Art In recent years, the display field has rapidly developed in line with the information age. In response to this trend, a flat panel display device (FPD) having a thinness, light weight, A plasma display panel (PDP), an electroluminescence display device (ELD), and a field emission display device (FED) : CRT).

Among them, the organic light emitting display device has a structure in which electrons and electrons injected through the anode and the cathode are recombined in the organic layer to form an excitation, and self-emission using a phenomenon in which light of a specific wavelength is generated by energy from the excitons formed Type display element. Such an organic light emitting display device does not require an additional surface light source such as a backlight unit, has an advantage of having a wide viewing angle, a fast response speed and a thin thickness.

The organic light emitting display includes, for example, a substrate, and a cathode layer, an organic light emitting layer, and a cathode layer sequentially formed on one surface of the substrate. Here, the anode layer may be formed of a transparent electrode, and the cathode layer may be formed of a reflective electrode.

Since the organic light emitting diode display includes the reflective electrode, there is a problem that when external light is incident, external light is reflected to lower the visibility of external light. Accordingly, an organic light emitting display device that further forms a polarizing layer for reducing reflection of external light has been developed. However, the polarizing layer has a problem of decreasing the transmission of light generated from the organic light emitting layer, thereby increasing the total power consumption for light generation of the organic light emitting layer.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an organic light emitting diode display capable of improving visibility to external light and reducing the total power consumption of light emitted from the organic light emitting layer by controlling the transmittance of each wavelength of light.

According to an aspect of the present invention, there is provided an OLED display including: a substrate having a first surface and a second surface opposite to the first surface, the display having a light emitting region and a non-emitting region; A thin film transistor formed in a non-emission region of the first surface of the substrate; A first electrode layer formed on the thin film transistor; An organic light emitting layer formed on the first electrode layer; A second electrode layer formed on the organic light emitting layer; A light blocking layer formed on the second surface of the substrate, the light blocking layer including a transparent substrate and a black pattern formed inside the transparent substrate; And a polarizing layer formed on the light blocking layer.

The black pattern includes a first black pattern formed of a plurality of first stripe lines in the emission region and a second black pattern formed of one second stripe line to correspond to the thin film transistor in the non-emission region, The width of the second stripe line may be greater than the width of the first stripe line. For example, the width of the second stripe line may be greater than twice the width of the first stripe line.

Wherein the black pattern includes a first black pattern formed of a plurality of first stripe lines in the light emitting region and a second black pattern formed of a plurality of second stripe lines to correspond to the thin film transistor in the non- The width of the second stripe line may be equal to the width of the first stripe line. Here, the number of the second stripe lines may be greater than the number of the first stripe lines. For example, the number of the second stripe lines may be more than twice as many as the number of the first stripe lines.

The height of the first stripe lines may be greater than the pitch of the first stripe lines.

The polarizing layer includes a linear polarizer and a retarder formed between the linear polarizer and the light blocking layer, and the transparent resin may be an optically isotropic resin.

The linear polarizer may be formed of a dye-based linear polarizer formed by dying a dye on a polyvinyl alcohol film and stretching the polyvinyl alcohol film.

The polarizing layer may be a dye filter formed by using a dye having a transmittance of 400 to 500 nm and a transmittance higher than a transmittance of 500 to 650 nm.

According to another aspect of the present invention, there is provided an OLED display comprising: a substrate having a first surface and a second surface opposite to the first surface, the display having a light emitting region and a non-emitting region; A thin film transistor formed in a non-emission region of the first surface of the substrate; A first electrode layer formed on the thin film transistor; An organic light emitting layer formed on the first electrode layer; A second electrode layer formed on the organic light emitting layer; A polarizing layer formed on a second surface of the substrate; And a light blocking layer formed on the polarizing layer and including a transparent substrate and a black pattern formed inside the transparent substrate.

The black pattern includes a first black pattern formed of a plurality of first stripe lines in the emission region and a second black pattern formed of one second stripe line to correspond to the thin film transistor in the non-emission region, The width of the second stripe line may be greater than the width of the first stripe line. For example, the width of the second stripe line may be greater than twice the width of the first stripe line.

Wherein the black pattern includes a first black pattern formed of a plurality of first stripe lines in the light emitting region and a second black pattern formed of a plurality of second stripe lines to correspond to the thin film transistor in the non- The width of the second stripe line may be equal to the width of the first stripe line. Here, the number of the second stripe lines may be greater than the number of the first stripe lines. For example, the number of the second stripe lines may be more than twice as many as the number of the first stripe lines.

The height of the first stripe lines may be greater than the pitch of the first stripe lines.

The polarizing layer may include a linear polarizer in contact with the light blocking layer, and a retarder formed between the second surface of the substrate and the linear polarizer.

The linear polarizer may be formed of a dye-based linear polarizer formed by dying a dye on a polyvinyl alcohol film and stretching the polyvinyl alcohol film.

The polarizing layer may be a dye filter formed by using a dye having a transmittance of 400 to 500 nm and a transmittance higher than a transmittance of 500 to 650 nm.

The organic light emitting diode display according to an embodiment of the present invention includes a light blocking layer including a transparent resin and a black pattern, thereby absorbing a part of the external light through the light blocking layer and reducing the reflectance of the external light.

Therefore, the organic light emitting diode display according to the embodiment of the present invention can improve the visibility of external light.

In addition, the organic light emitting diode display according to an embodiment of the present invention includes a linear polarization plate composed of a dye-based linear polarization plate and a polarizing layer including a retarder, so that the linear polarization plate composed of a dye- The transmittance of each wavelength of light can be controlled.

Therefore, the organic light emitting display according to the embodiment of the present invention can reduce the total power consumption of the organic light emitting layer by controlling the transmittance of each wavelength of light.

1 is a cross-sectional view of an OLED display according to an embodiment of the present invention.
2 is a cross-sectional view of an OLED display according to another embodiment of the present invention.
3 is a cross-sectional view of an OLED display according to another embodiment of the present invention.
4 is a cross-sectional view of an OLED display according to another embodiment of the present invention.
5 is a cross-sectional view of an OLED display according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 is a cross-sectional view of an OLED display according to an embodiment of the present invention.

1, an OLED display 100 according to an exemplary embodiment of the present invention includes a substrate 110, a first electrode layer 120, a bank layer 130, an organic light emitting layer 140, 150, a light blocking layer 160, and a polarization layer 170. The organic light emitting diode display 100 according to an embodiment of the present invention includes a buffer layer 111 and a thin film transistor Tr formed between the substrate 110 and the first electrode layer 120.

In the present invention, the organic light emitting diode display 100 is implemented as a bottom emission type in which light emitted from the organic light emitting layer 140 is emitted toward the substrate 110 to display an image. .

The substrate 110 includes a first surface 110a and a second surface 110b opposite to the first surface 110a and includes a light emitting region EA and a non-light emitting region NEA. The substrate 110 is formed of a transparent glass substrate or a transparent resin so that light generated in the organic light emitting layer 140 can be transmitted. As the transparent resin, for example, polymethylmethacrylate (PMMA), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polypropylene adipate (PPA), polyisocyanate (PI) .

The buffer layer 111 is formed on the entire surface of the first surface 110a of the substrate 110 to prevent diffusion of moisture or impurities generated in the substrate 110. [ The buffer layer 111 may be formed of SiOx or SiNx.

 The thin film transistor Tr includes a semiconductor layer 112, a gate insulating film 113, a gate electrode 114, an interlayer insulating film 115, a source electrode 116, a drain electrode 117 and a protective layer 118 do. The thin film transistor Tr drives the organic light emitting layer 140 according to a driving signal received from a driving circuit unit (not shown).

The semiconductor layer 112 is formed on the buffer layer 111 so as to be disposed in the non-emission region NEA of the substrate 110 and functions as a channel of the thin film transistor Tr. The semiconductor layer 112 may be formed of a material such as amorphous silicon.

The gate insulating layer 113 is formed on the entire surface of the buffer layer 111 so as to cover the semiconductor layer 112 and insulates the gate electrode 114 located on the semiconductor layer 112 from other structures. The gate insulating layer 113 may be formed of SiOx or SiNx.

The gate electrode 114 is formed on the gate insulating layer 113 to correspond to the semiconductor layer 112. The gate electrode 114 is formed of a conductive metal and may be formed of at least one of Al, Cu, Mo, Nd, Ti, Pt, Ag, Nb, Cr, W and Ta.

The interlayer insulating film 115 is formed on the gate insulating film 113 so as to cover the gate electrode 114. The interlayer insulating layer 115 insulates the gate electrode 114 from the source electrode 116 and the drain electrode 117. The interlayer insulating layer 115 may be formed of SiOx or SiNx.

The source electrode 116 and the drain electrode 117 are formed to penetrate the interlayer insulating layer 115 on both sides of the gate electrode 114 of the interlayer insulating layer 115 and are electrically connected to the semiconductor layer 112 . The source electrode 116 and the drain electrode 117 may be formed of a conductive metal such as Al, Cu, Mo, Nd, Ti, Pt, Ag, Nb, Cr, W and Ta.

The protective layer 118 is formed on the interlayer insulating film 115 so as to cover the source electrode 116 and the drain electrode 117 and serves to insulate the source electrode 116 and the drain electrode 115 from other structures do. The passivation layer 118 may be formed of an inorganic insulating material such as SiOx or SiNx or an organic insulating material such as polyimide (PI), benzocyclobutene (BCB) acrylate, or the like.

The first electrode layer 120 is formed on the passivation layer 118 in the emission region EA of the substrate 110 and extends through the region corresponding to the drain electrode 117 of the passivation layer 118, As shown in Fig. The first electrode layer 120 may serve as an anode for supplying a hole and may transmit light generated from the organic light emitting layer 140. The first electrode layer 120 may be formed of a transparent electrode material, for example, indium tin oxide (ITO).

The bank layer 130 is formed on the protection layer 18 in the non-emission region NEA of the substrate 110 so as to cover the edge of the first electrode layer 120. [ The bank layer 130 defines a red sub-pixel, a green sub-pixel, and a blue sub-pixel in the substrate 110. The bank layer 130 may be formed of an insulating material, for example, polyimide, photosensitive resin, silicon oxide, or the like.

The organic light emitting layer 140 is formed on the first electrode layer 120 and the bank layer 130. The organic light emitting layer 140 is formed by recombination of holes supplied from the first electrode layer 120 and electrons supplied from the second electrode layer 150, Thereby generating light. The organic light emitting layer 140 includes an electron injecting layer (not shown) sequentially in contact with the second electrode layer 150 and includes a hole injecting layer (not shown) and a hole transporting layer (not shown) sequentially contacting the first electrode layer 120. And an organic layer (not shown) including an electron transport layer (not shown) and interposed between the hole transport layer and the electron transport layer to substantially recombine holes and electrons to generate light. Here, the organic layer may be any one of a red organic layer, a green organic layer, and a blue organic layer.

The second electrode layer 150 is formed on the organic light emitting layer 140. The second electrode layer 150 may function as a cathode for supplying electrons and may reflect light generated from the organic light emitting layer 140 to be emitted toward the substrate 110. The second electrode layer 150 may be formed of any one selected from a metal having a low work function, for example, aluminum, silver, neodymium-aluminum alloy, gold-aluminum alloy, and magnesium- have. The first electrode layer 120 and the second electrode layer 150 may have different polarities. In this case, the positions of the hole injecting layer, the hole transporting layer, the electron injecting layer and the electron transporting layer may be changed.

The light blocking layer 160 is formed on the second surface 110b of the substrate 110 and includes a transparent substrate 161 and a black pattern 162 formed inside the transparent substrate 161. [ The light blocking layer 160 absorbs a part of the external light passing through the polarizing plate 170, thereby reducing the reflectance of the external light.

The transparent substrate 161 is formed over the light emitting region EA and the non-light emitting region NEA of the substrate 110. Here, the transparent substrate 161 may be formed of an optically isotropic resin, for example, a polycarbonate, a polyester sulphone, a cycloolefin polymer, or the like. The optically isotropic resin is a resin that prevents phase difference between light in a state before the transparent substrate 161 is incident and light in a state after the transparent substrate 161 is incident. Here, when the transparent substrate 161 is formed of optically isotropic resin, a phase difference occurs between the external light before the transparent substrate 161 is incident and the external light that has passed through the transparent substrate 161. When the external light having passed through the transparent substrate 161 and then reflected by the second electrode 150 and then passing through the transparent substrate 161 is not perpendicular to the absorption axis of the linear polarizer 172 of the polarizing layer 170 Direction and can be reflected to the outside. In this case, visibility to external light is reduced.

The black pattern 162 may be formed of a material selected from black ink, black dye, and black pigment. The black pattern 162 substantially absorbs part of the external light passing through the polarizing plate 170, thereby reducing the reflectance of the external light. The black pattern 162 may be formed in such a manner that external light is incident on the thin film transistor Tr portion of the organic light emitting layer 140 without interfering with the transmission of light emitted through the substrate 110 to the outside as much as possible, So as not to deteriorate the characteristics. The black pattern 162 includes a first black pattern 162a formed of a plurality of first stripe lines st11 in the emission region EA of the substrate 110, And a second black pattern 162b formed of one second stripe line st12 corresponding to the thin film transistor Tr. Here, the width of the second stripe line st12 may be greater than the width of the second stripe line st1. For example, the width of the second stripe line st2 may be greater than twice the width of the second stripe line st1. The height H of the plurality of first stripe lines st1 may be greater than the pitch P of the plurality of first stripe lines st1. This is to prevent the shape of the first black pattern 162a from being observed with the naked eye by generating a shadow effect.

The polarizing layer 170 is formed on the light blocking layer 160 to transmit light generated from the organic light emitting layer 140 at a predetermined transmittance and to absorb external light to reduce the reflectance of external light. The polarizing layer 170 includes a linear polarizer 172 and a retarder 174 formed between the linear polarizer 172 and the light blocking layer 160 .

The linearly polarizing plate 172 has a transmission axis in the vertical direction, thereby allowing light in the vertical direction to pass through the external light. The linear polarizer 172 may be an iodine linear polarizer formed by dying iodine in a polyvinyl alcohol (PVA) film and then stretching the polyvinyl alcohol film, or may be formed by dyes dyes in a polyvinyl alcohol film, Based linear polarizer formed by stretching an alcohol film. Here, when the linear polarizer 172 is formed of a dye-based linear polarizer, the transmittance of light emitted from the organic light emitting layer 140 may be controlled by wavelength. For example, the linear polarizer 172 formed of a dye-based linear polarizer increases the transmittance of blue light having a wavelength band of 400 to 500 nm and the transmittance of red light and green light having a wavelength band of 500 to 650 nm. As described above, the linear polarizer 172 formed of the dye-based linear polarizer can increase the transmittance of blue light for generating high power consumption and reduce the total power consumption of the organic light emitting layer 140 for generating light.

The retarder 174 has an angle of 45 degrees with respect to the central axis of the linear polarizer 172. The retarder 174 is in a circular polarization state while retarding the phase of external light having passed through the linear polarizer 172 by? / 4 Change. Here, a part of the external light in the circularly polarized state can be absorbed by the black pattern 162 of the light blocking layer 160. Another part of the external light in the circularly polarized state passes through the transparent resin 161, is reflected by the second electrode layer 150, passes through the retarder 174, and is transformed into a linearly polarized state. At this time, the external light having passed through the retarder 174 is perpendicular to the external light that has not passed through the retarder 174. The linearly polarized external light having passed through the retarder 174 is incident on the linear polarizer 172 and then extinguished. The reason is that the external light in the linearly polarized state and the transmission axis of the linearly polarized light plate 172 are perpendicular to each other, and thus the external light in the linearly polarized state is entirely polarized.

As described above, the organic light emitting diode display 100 according to an embodiment of the present invention includes the light blocking layer 160 including the transparent resin 161 and the black pattern 162, It is possible to reduce the reflectance at which the external light is reflected to the outside. Accordingly, the organic light emitting diode display 100 according to an embodiment of the present invention can improve the visibility of external light.

The OLED display 100 according to an exemplary embodiment of the present invention includes the polarizing layer 170 including the linear polarizer 172 and the retarder 174 formed of a dye-based linear polarizer, The transmittance of the light emitted from the organic light emitting layer 140 can be controlled by the linear polarizer 172 composed of the linear polarizer. Accordingly, the organic light emitting diode display 100 according to an embodiment of the present invention can increase the transmittance of blue light for generating high power consumption, thereby reducing the total power consumption of the organic light emitting layer 140 for generating light.

Hereinafter, an OLED display according to another embodiment of the present invention will be described.

2 is a cross-sectional view of an OLED display according to another embodiment of the present invention.

The OLED display 200 according to another embodiment of the present invention has the same configuration and the same function as the OLED display 100 of FIG. Accordingly, only the light blocking layer 260 will be described in the OLED display 200 according to another embodiment of the present invention.

2, the light blocking layer 260 includes a transparent resin 161 and a black pattern 262 formed of a first black pattern 162a and a second black pattern 262b. This light blocking layer 260 is similar to the light blocking layer 160 of FIG.

Unlike the second black pattern 162a of FIG. 1, the second black pattern 262b is formed of a plurality of second stripe lines st22. Here, the width of the second stripe line st22 may be equal to the width of the second stripe line st11. The number of the plurality of second stripe lines st22 is set to be larger than the number of the plurality of first stripe lines st11. For example, the number of the plurality of second stripe lines st22 is set to be more than twice as many as the number of the plurality of first stripe lines st11.

As described above, the organic light emitting diode display 200 according to another embodiment of the present invention includes the light blocking layer 260 including the transparent resin 161 and the black pattern 262, It is possible to reduce the reflectance at which the external light is reflected to the outside. Accordingly, the OLED display 200 according to another embodiment of the present invention can improve the visibility of external light.

The OLED display 200 according to another embodiment of the present invention includes the linear polarizer 172 and the retarder 174 formed of a dye-based linear polarizer, The transmittance of the light emitted from the organic light emitting layer 140 can be controlled by the linear polarizer 172 composed of the linear polarizer. Accordingly, the organic light emitting diode display 200 according to another embodiment of the present invention can increase the transmittance of blue light for generating high power consumption, thereby reducing the total power consumption of the organic light emitting layer 140 for generating light.

Hereinafter, an OLED display according to another embodiment of the present invention will be described.

3 is a cross-sectional view of an OLED display according to another embodiment of the present invention.

The OLED display 300 according to another embodiment of the present invention is different from the OLED display 100 of FIG. 1 only in the arrangement of the polarizing layer 360 and the light blocking layer 370, And plays the same role. Accordingly, only the polarizing layer 360 and the light blocking layer 370 will be described in the OLED display 300 according to another embodiment of the present invention.

Referring to FIG. 3, the polarizing layer 360 is formed on the second surface 110b of the substrate 110. FIG. Specifically, the polarizing layer 360 includes a linear polarizer 362 in contact with the light blocking layer 370, a retarder 364 formed between the linear polarizer 362 and the second surface 110b of the substrate 110, . The linear polarizer 362 and the retarder 364 are configured in the same manner as the linear polarizer 372 and the retarder 374 of FIG.

The light blocking layer 370 is formed on the polarizing layer 360. Specifically, the light blocking layer 370 includes a transparent resin 371 contacting the linear polarizer 362 of the polarizing layer 360 and a black pattern 372 formed inside the transparent resin 371. The black pattern 372 includes a first black pattern 372a and a second black pattern 372b and is constructed in the same manner as the black pattern 162 in FIG. Unlike the transparent resin 161, it is not necessary to be formed of an optically isotropic resin. This is because the polarizing layer 360 is disposed directly on the second surface 110b of the substrate 110. [ That is, after passing through the transparent substrate 361, the external light that has been reflected by the second electrode 150 and passed through the transparent substrate 361 is polarized in a direction perpendicular to the transmission axis of the linear polarizer 362 of the polarizing layer 360 In the polarizing layer 360 in a state where the polarizing layer 360 is formed. The external light having passed through the transparent substrate 361 and then reflected by the second electrode 150 and then passing through the transparent substrate 361 is reflected by the light blocking layer 361 when external light is first incident on the organic light emitting device 300. [ 370).

As described above, the organic light emitting diode display 300 according to another embodiment of the present invention includes the light blocking layer 370 including the transparent resin 371 and the black pattern 372, It is possible to reduce the reflectance at which a part of the external light is absorbed and the external light is reflected to the outside. Accordingly, the OLED display 300 according to another embodiment of the present invention can improve the visibility of external light.

The OLED display 300 according to another embodiment of the present invention includes the linear polarization plate 362 made of a dye-based linearly polarizing plate and the polarizing layer 360 including the retarder 364, The transmittance of light emitted from the organic light emitting layer 140 can be controlled by the wavelength of the light through the linearly polarizing plate 362 formed of a linear polarizing plate. Accordingly, the organic light emitting diode display 300 according to another embodiment of the present invention can increase the transmittance of blue light for generating high power consumption, thereby reducing the total power consumption of the organic light emitting layer 140 for generating light.

Although not shown, the second black pattern 372b of the black pattern 370 is formed as one stripe line st12 in another OLED display 300 according to another embodiment of the present invention, And may be formed of a plurality of stripe lines st22 as the second black pattern 262b.

Hereinafter, an OLED display according to another embodiment of the present invention will be described.

4 is a cross-sectional view of an OLED display according to another embodiment of the present invention.

The OLED display 400 according to another embodiment of the present invention is different from the OLED display 100 of FIG. 1 only in that the light blocking layer 460 and the polarizing layer 470 are different from each other, It plays a role. Accordingly, only the light blocking layer 460 and the polarizing layer 470 will be described in the OLED display 400 according to another embodiment of the present invention.

4, the light blocking layer 460 includes a transparent resin 461, a black pattern 162 having a first black pattern 162a and a second black pattern 162b, (160). However, the transparent resin 461 of the light blocking layer 460 is not necessarily an optically isotropic resin, unlike the transparent resin 161 of FIG. This is because the polarizing layer 470 is not configured to polarize light like the polarizing plate 170 in Fig.

Unlike the polarizing layer 170 of FIG. 1, the polarizing layer 470 is composed of a dye filter. Here, the dye filter is a filter formed by using a dye which shields the external light while increasing the transmittance of blue light having a wavelength band of 400 to 500 nm to the transmittance of red light and green light having a wavelength band of 500 to 650 nm.

As described above, the organic light emitting diode display 400 according to another embodiment of the present invention includes the light blocking layer 460 including the transparent resin 461 and the black pattern 162, It is possible to reduce the reflectance at which a part of the external light is absorbed and the external light is reflected to the outside. Accordingly, the OLED display 400 according to another embodiment of the present invention can improve the visibility of external light.

The organic light emitting diode display 400 according to another embodiment of the present invention includes a polarizing layer 470 formed of a dye filter so that light emitted from the organic light emitting layer 140 through the polarizing layer 470 The transmittance of each wavelength can be controlled. Accordingly, the organic light emitting diode display 400 according to another embodiment of the present invention can increase the transmittance of blue light for generating high power consumption, thereby reducing the total power consumption of the organic light emitting layer 140 for generating light.

Although not shown, the second black pattern 162b of the black pattern 162 is formed as one stripe line st12 in another OLED display 400 according to another embodiment of the present invention, And may be formed of a plurality of stripe lines st22 as the second black pattern 262b.

Hereinafter, an OLED display according to another embodiment of the present invention will be described.

5 is a cross-sectional view of an OLED display according to another embodiment of the present invention.

The OLED display 500 according to another embodiment of the present invention is different from the OLED display 400 of FIG. 4 only in the arrangement of the polarizing layer 560 and the light blocking layer 570, And plays the same role. Accordingly, only the polarizing layer 560 and the light blocking layer 570 will be described in the OLED display 500 according to another embodiment of the present invention.

5, the polarizing layer 560 is formed on the second surface 110b of the substrate 110 and has the same configuration as that of the polarizing layer 470 of FIG. 4 only.

The light blocking layer 570 is formed on the polarizing layer 560 and is different from the light blocking layer 460 of FIG. That is, the light blocking layer 570 includes a transparent resin 461 and a black pattern 462 having a first black pattern 162a and a second black pattern 162b.

As described above, the organic light emitting diode display 500 according to another embodiment of the present invention includes the light blocking layer 570 including the transparent resin 461 and the black pattern 162, It is possible to reduce the reflectance at which a part of the external light is absorbed and the external light is reflected to the outside. Accordingly, the OLED display 500 according to another embodiment of the present invention can improve the visibility of external light.

The OLED display 500 according to another embodiment of the present invention includes a polarizing layer 560 formed of a dye filter so that light emitted from the organic light emitting layer 140 through the polarizing layer 560 The transmittance of each wavelength can be controlled. Accordingly, the organic light emitting diode display 500 according to another embodiment of the present invention can increase the transmittance of blue light for generating high power consumption, thereby reducing the total power consumption of the organic light emitting layer 140 for generating light.

Although not shown, the second black pattern 162b of the black pattern 162 is formed as one stripe line st12 in another OLED display 500 according to another embodiment of the present invention, And may be formed of a plurality of stripe lines st22 as the second black pattern 262b.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation and that those skilled in the art will understand that various modifications and equivalent arrangements may be made therein It will be possible.

100, 200, 300, 400, 500: organic light emitting display 110: substrate
120: first electrode layer 130: bank layer
140: organic light emitting layer 150: second electrode layer
160, 260, 370, 460, 570:
161, 371, 461: Transparent substrate 162, 262, 372: Black pattern
170, 360, 470, 560: polarizing layer 172, 362: linear polarizer
174, 364: retarder

Claims (20)

A substrate having a first surface and a second surface opposite to the first surface, the substrate having a light emitting region and a non-emitting region;
A thin film transistor located in a non-emission region of a first surface of the substrate;
A first electrode layer located on the thin film transistor;
An organic light emitting layer disposed on the first electrode layer;
A second electrode layer disposed on the organic light emitting layer;
A light blocking layer disposed on the second surface of the substrate and including a transparent substrate and a black pattern formed inside the transparent substrate; And
And a polarizing layer positioned on the light blocking layer,
Wherein the black pattern includes a first black pattern provided in the light emitting region as a plurality of first stripe lines and a second black pattern provided in the non-emitting region as one second stripe line to correspond to the thin film transistor,
Wherein a width of the second stripe line is larger than a width of the first stripe line. delete The method according to claim 1,
Wherein a width of the second stripe line is at least two times larger than a width of the first stripe line. A substrate having a first surface and a second surface opposite to the first surface, the substrate having a light emitting region and a non-emitting region;
A thin film transistor located in a non-emission region of a first surface of the substrate;
A first electrode layer located on the thin film transistor;
An organic light emitting layer disposed on the first electrode layer;
A second electrode layer disposed on the organic light emitting layer;
A light blocking layer disposed on the second surface of the substrate and including a transparent substrate and a black pattern formed inside the transparent substrate; And
And a polarizing layer positioned on the light blocking layer,
Wherein the black pattern includes a first black pattern formed as a plurality of first stripe lines in the light emitting region and a second black pattern provided as a plurality of second stripe lines to correspond to the thin film transistor in the non-
And the width of the second stripe line is equal to the width of the first stripe line. 5. The method of claim 4,
Wherein the number of the second stripe lines is larger than the number of the first stripe lines. 5. The method of claim 4,
Wherein the number of the second stripe lines is two or more times larger than the number of the first stripe lines. 5. The method according to any one of claims 1 to 4,
Wherein a height of the first stripe lines is larger than a pitch of the first stripe lines. 5. The method according to any one of claims 1 to 4,
Wherein the polarizing layer comprises a linear polarizer and a retarder positioned between the linear polarizer and the light blocking layer,
Wherein the transparent resin is an optically isotropic resin. 5. The method according to any one of claims 1 to 4,
Wherein the polarizing layer comprises a linear polarizer and a retarder positioned between the linear polarizer and the light blocking layer,
The transparent resin is an optically isotropic resin,
Wherein the linear polarizer is a dye-based linear polarizer formed by dying a dye on a polyvinyl alcohol film and then stretching a polyvinyl alcohol film. 5. The method according to any one of claims 1 to 4,
Wherein the polarizing layer is a dye filter formed using a dye having a transmittance of 400 to 500 nm and a transmittance higher than a transmittance of 500 to 650 nm. A substrate having a first surface and a second surface opposite to the first surface, the substrate having a light emitting region and a non-emitting region;
A thin film transistor located in a non-emission region of a first surface of the substrate;
A first electrode layer located on the thin film transistor;
An organic light emitting layer disposed on the first electrode layer;
A second electrode layer disposed on the organic light emitting layer;
A polarizing layer positioned on a second side of the substrate; And
And a light blocking layer disposed on the polarizing layer and including a transparent substrate and a black pattern provided inside the transparent substrate,
Wherein the black pattern includes a first black pattern provided in the light emitting region as a plurality of first stripe lines and a second black pattern provided in the non-emitting region as one second stripe line to correspond to the thin film transistor,
Wherein a width of the second stripe line is larger than a width of the first stripe line. delete 12. The method of claim 11,
Wherein a width of the second stripe line is at least two times larger than a width of the first stripe line. A substrate having a first surface and a second surface opposite to the first surface, the substrate having a light emitting region and a non-emitting region;
A thin film transistor located in a non-emission region of a first surface of the substrate;
A first electrode layer located on the thin film transistor;
An organic light emitting layer disposed on the first electrode layer;
A second electrode layer disposed on the organic light emitting layer;
A polarizing layer positioned on a second side of the substrate; And
And a light blocking layer disposed on the polarizing layer and including a transparent substrate and a black pattern provided inside the transparent substrate,
Wherein the black pattern includes a first black pattern formed as a plurality of first stripe lines in the light emitting region and a second black pattern provided as a plurality of second stripe lines to correspond to the thin film transistor in the non-
And the width of the second stripe line is equal to the width of the first stripe line. 15. The method of claim 14,
Wherein the number of the second stripe lines is larger than the number of the first stripe lines. 16. The method of claim 15,
Wherein the number of the second stripe lines is two or more times larger than the number of the first stripe lines. 15. The method according to any one of claims 11 to 14,
Wherein a height of the first stripe lines is larger than a pitch of the first stripe lines. 15. The method according to any one of claims 11 to 14,
Wherein the polarizing layer comprises a linear polarizer in contact with the light blocking layer, and a retarder positioned between the second surface of the substrate and the linear polarizer. 15. The method according to any one of claims 11 to 14,
Wherein the polarizing layer comprises a linear polarizer in contact with the light blocking layer, and a retarder positioned between the second surface of the substrate and the linear polarizer,
Wherein the linear polarizer is a dye-based linear polarizer formed by dying a dye on a polyvinyl alcohol film and then stretching a polyvinyl alcohol film. 15. The method according to any one of claims 11 to 14,
Wherein the polarizing layer is a dye filter formed using a dye having a transmittance of 400 to 500 nm and a transmittance higher than a transmittance of 500 to 650 nm.

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