KR20120134222A - White organic light emitting diode display device - Google Patents

Abstract

PURPOSE: A white organic light-emitting diode display device is provided to prevent a color shift phenomenon of a white sub pixel by overlapping a part of a color filter of a sub pixel with a white sub pixel. CONSTITUTION: A substrate is formed into red, green, blue, and white sub pixels(R,G,B,W). Red, green, blue, and sky blue color filters(108R,108G,108B,108S) are formed in the red, green, blue, and white sub pixels. A white organic light-emitting layer is formed on the substrate which forms the red, green, and blue color filters. The color filters in the red, green, and blue sub pixels are overlapped with the white sub pixels. A black matrix is included between the sub pixels.

Description

White organic light emitting diode display device {WHITE ORGANIC LIGHT EMITTING DIODE DISPLAY DEVICE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a white organic light emitting diode (W-OLED) display device, and more particularly, to a white organic light emitting diode display that realizes full color by adding a white sub-pixel. It relates to an element.

In recent years, there has been a growing interest in information display and a demand for a portable information medium has increased, and a lightweight flat panel display (FPD) that replaces a cathode ray tube (CRT) And research and commercialization are being carried out.

In the field of flat panel display devices, a liquid crystal display device (LCD) has been the most noticeable display device until now, but the liquid crystal display device is not a light emitting device but a light receiving device and has a brightness and contrast ratio. Due to disadvantages such as ratio, viewing angle, and the like, development of a new display device capable of overcoming these disadvantages is being actively developed.

The organic light emitting diode display device, which is one of the new display devices, is self-luminous and thus has a better viewing angle and contrast ratio than the liquid crystal display device, and is light in weight because it does not require a backlight, and is advantageous in terms of power consumption. Do. In addition, there is an advantage that the DC low-voltage drive is possible and the response speed is fast, in particular, it has an advantage in terms of manufacturing cost.

In the manufacturing process of the organic light emitting diode display device, unlike the liquid crystal display device or the plasma display panel (PDP), the deposition and encapsulation processes are all processes, and thus the manufacturing process is very simple. . Further, if the organic light emitting diode display device is driven by an active matrix method having a thin film transistor (TFT) as a switching element for each pixel, even if a low current is applied, the same luminance is exhibited, It has advantages of fixed tax and large size.

Hereinafter, the basic structure and operation characteristics of the organic light emitting diode display device will be described in detail with reference to the accompanying drawings.

1 is a diagram for explaining the principle of light emission of a general organic light emitting diode display device.

A general organic light emitting diode display device includes an organic light emitting diode as shown in FIG. 1. The organic light emitting diode includes organic compound layers 30a, 30b, 30c, 30d, and 30e formed between an anode 18 as a pixel electrode and a cathode 28 as a common electrode.

In this case, the organic compound layers 30a, 30b, 30c, 30d, and 30e may include a hole injection layer 30a, a hole transport layer 30b, an emission layer 30c, and an electron. An electron transport layer 30d and an electron injection layer 30e.

When a driving voltage is applied to the anode 18 and the cathode 28, holes passing through the hole transport layer 30b and electrons passing through the electron transport layer 30d are moved to the emission layer 30c to form excitons. As a result, the light emitting layer 30c emits visible light.

The organic light emitting diode display element displays an image by arranging pixels having the organic light emitting diode having the above-described structure in a matrix form and selectively controlling the pixels with data voltage and scan voltage.

The organic light emitting diode display device is divided into a passive matrix display device or an active matrix display device using a TFT as a switching device. The active matrix method selectively turns on the TFT, which is an active element, to select a pixel and maintain the light emission of the pixel at a voltage held in a storage capacitor.

FIG. 2 is an equivalent circuit diagram of one sub-pixel in a conventional organic light emitting diode display, and a typical 2T1C (two transistors and one capacitor) in an active matrix type organic light emitting diode display. The equivalent circuit diagram for the sub-pixels is shown.

Referring to FIG. 2, the sub-pixels of the organic light emitting diode display device of the active matrix type include the organic light emitting diode OLED, the data line DL and the gate line GL, the switching TFT SW, and the driving of the organic light emitting diode OLED. A TFT DR and a storage capacitor Cst are provided.

At this time, the switching TFT SW is turned on in response to a scan pulse from the gate line GL, thereby conducting a current path between the source electrode and the drain electrode. The data voltage from the data line DL during the on-time period of the switching TFT SW is supplied to the gate electrode of the driving TFT DR and the storage capacitor Cst through the source electrode and the drain electrode of the switching TFT SW, .

At this time, the driving TFT DR controls a current flowing in the organic light emitting diode OLED according to a data voltage applied to its gate electrode. Then, the storage capacitor Cst stores the voltage between the data voltage and the low potential power supply voltage VSS, and keeps it constant for one frame period.

Recently, white organic light emitting diode (W-OLED) has attracted much attention as a technology to meet the market demand as it focuses on the medium and large display market, away from small display panels for mobile devices. . The W-OLED uses color filters to realize red, green, and blue colors.

3 is a plan view exemplarily illustrating one pixel of a typical white organic light emitting diode display device, and illustrates one pixel structure including red, green, blue, and white sub-pixels (R, G, B, and W). It is indicated by.

Referring to FIG. 3, a typical W-OLED display device implements red, green, and blue colors using red, green, and blue color filters 8R, 8G, and 8B. In this case, a color filter is not applied to the white sub-pixel W, and a black matrix 6 is provided between the sub-pixels R, G, B, and W.

Recent advances in OLED research have increased the potential for the development of OLED displays for a wide range of applications, while drive stability of currently available OLED displays has been less than expected in some examples. Many known OLED displays have relatively short drive lifetimes before their brightness drops to some percentage of their initial value.

In particular, to realize full-color displays, there is a need for the development of OLEDs that emit in the red, green and blue regions of the visible spectrum. Recent developments have led to the development of green and red OLEDs with improved performance in commercial applications, but the driving stability of blue OLEDs is still unsatisfactory.

The W-OLEDs that use one or more colors of light emitting materials experience the same disadvantages with regard to efficiency and stability as color light emitting OLEDs. In particular, there is a color shift phenomenon in which white light of a white sub-pixel is yellowish due to poor luminous ability of a blue OLED.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a white organic light emitting diode display device capable of improving color shift of a white sub-pixel.

Other objects and features of the present invention will be described in the configuration and claims of the invention which will be described later.

In order to achieve the above object, the white organic light emitting diode display device of the present invention comprises a substrate having a plurality of pixels consisting of red, green, blue and white sub-pixel; Red, green, and blue color filters formed on the red, green, blue, and white sub-pixels; And a white organic light emitting layer formed on the substrate on which the red, green, and blue color filters are formed, wherein the red, green, blue, and white sub-pixels are ordered according to a color shift of the white organic light emitting layer. In addition, the color filter of red, green, and blue sub-pixels having a complementary color relationship with the color to be changed in color is superimposed on the white sub-pixels.

At this time, it characterized in that it further comprises a black matrix provided between the sub-pixels.

When the white organic light emitting layer is yellowish, the sub-pixels are arranged in the order of red, green, blue and white sub-pixels.

In this case, the blue color filter is formed not only to cover the entire blue sub-pixel, but also extends toward the white sub-pixel to overlap with the white sub-pixel by about 10% to 80%.

When the white organic light emitting layer is brownish, the sub-pixels are arranged in the order of red, green, white and blue sub-pixels.

In this case, the green color filter not only covers the entire green sub-pixel, but also extends toward the white sub-pixel to overlap the white sub-pixel, and the blue color filter is the blue sub-pixel. It is formed so as to cover the whole, and extends toward the white sub-pixel so as to overlap the white sub-pixel.

In this case, each of the green color filter and the blue color filter may extend toward the white sub-pixel and overlap with the white sub-pixel by about 5% to 40%.

When the white organic light emitting layer is bluish, the sub-pixels are arranged in the order of red, white, green and blue sub-pixels.

In this case, the red color filter not only covers the entire red sub-pixel but also extends toward the white sub-pixel to overlap the white sub-pixel, and the green color filter is the green sub-pixel. It is formed so as to cover the whole, and extends toward the white sub-pixel so as to overlap the white sub-pixel.

In this case, each of the red color filter and the green color filter extends toward the white sub-pixel and is formed to overlap with the white sub-pixel by about 5% to 40%.

When the white organic light emitting layer is greenish, the sub-pixels are arranged in the order of red, green, blue and white sub-pixels.

In this case, the red color filter not only covers the entire red sub-pixel, but also extends toward the white sub-pixel to overlap the white sub-pixel, and the blue color filter is the blue sub-pixel. It is formed so as to cover the whole, and extends toward the white sub-pixel so as to overlap the white sub-pixel.

In this case, each of the red color filter and the blue color filter extends toward the white sub-pixel and is formed to overlap with the white sub-pixel by about 5% to 40%.

As described above, the white organic light emitting diode display according to the present invention adjusts the order of the sub-pixels, while partially substituting a part of the color filter of the sub-pixels to form a complementary color relationship with the color that becomes the color of the white sub-pixels. By superimposing on the pixel, the color shift phenomenon of the white sub-pixel can be improved.

As described above, the white organic light emitting diode display device according to the present invention can adjust the color coordinates of the W-OLED without additional cost because the color filter process is not increased, and has an effect capable of coping with various distortions of the color coordinates of the W-OLED. .

In addition, the white organic light emitting diode display device according to the present invention classifies the W-OLED into various groups to deriv and develop various models according to color coordinates, thereby providing an effect of improving the yield and application to a product.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram for explaining the principle of light emission of a general organic light emitting diode display element. FIG.
FIG. 2 is an equivalent circuit diagram of one sub-pixel in a conventional organic light emitting diode display. FIG.
3 is a plan view illustrating one pixel of a typical white organic light emitting diode display device;
4 is a plan view illustrating one pixel of a white organic light emitting diode display device according to a first exemplary embodiment of the present invention.
5A and 5B are plan views and cross-sectional views illustrating one pixel of a white organic light emitting diode display device according to a second exemplary embodiment of the present invention.
6A and 6B are plan views and cross-sectional views illustrating one pixel of a white organic light emitting diode display device according to a third exemplary embodiment of the present invention.
7A and 7B are plan views and cross-sectional views illustrating one pixel of a white organic light emitting diode display device according to a fourth exemplary embodiment of the present invention.
8A and 8B are plan views and cross-sectional views illustrating one pixel of a white organic light emitting diode display device according to a fifth exemplary embodiment of the present invention.

Hereinafter, exemplary embodiments of a white organic light emitting diode display device according to the present invention will be described in detail with reference to the accompanying drawings.

4 is a plan view exemplarily illustrating one pixel of a white organic light emitting diode (W-OLED) display device according to a first embodiment of the present invention. And one pixel composed of white sub-pixels (R, G, B, W), for example.

In this case, the sub-pixels R, G, B, and W according to the first embodiment of the present invention only need to have the order of red, green, blue, and white sub-pixels (R, G, B, and W). Is applicable regardless of which sub-pixels (R, G, B, W) are located first.

Referring to FIG. 4, the W-OLED display device according to the first exemplary embodiment of the present invention uses red, green, blue, and light blue color filters 108R, 108G, 108B, and 108S. Implementing the sky color can improve the color coordinate distortion of the yellowish white light.

As described above, the W-OLED display device according to the first embodiment of the present invention is characterized in that the sky blue color filter 108S is applied to the white sub-pixel W to improve the color coordinate distortion of the yellowish white light. do. In this case, a black matrix 106 is provided between the sub-pixels R, G, B, and W.

However, the W-OLED display device according to the first embodiment of the present invention requires the development of a new resin for the light color color filter 108S in addition to the existing red, green, and blue color resins. The disadvantage is that the process increases from three to four times. In addition, since the sky blue color filter 108S covers the entire white sub-pixel W, the efficiency of the white is reduced and the current consumed is increased.

5A and 5B are plan views and cross-sectional views illustrating one pixel of a white organic light emitting diode display device according to a second exemplary embodiment of the present invention, in order of red, green, blue, and white sub-pixels in order from the left. One pixel consisting of R, G, B, and W is shown as an example.

At this time, the sub-pixels (R, G, B, W) according to the second embodiment of the present invention are the same as the first embodiment described above, red, green, blue and white sub-pixels (R, G, B) It can be applied irrespective of which sub-pixels (R, G, B, W) are located first, as long as they have the order, W).

5A and 5B, the W-OLED display device according to the second embodiment of the present invention uses red, green, and blue color filters 208R, 208G, 208B, and 208B '. Implementing blue can improve color coordinate distortion of yellowish white light.

In this case, the blue color filters 208B and 208B 'may be formed to cover the entire blue sub-pixel B and extend toward the white sub-pixel W to partially and partially cover the white sub-pixel W. Depending on the degree of distortion of the color coordinates of the white light, for example, it is characterized in that it is formed so as to overlap about 10% to 80%.

As described above, the W-OLED display device according to the second exemplary embodiment of the present invention uses the blue color filters 208B and 208B 'to form a complementary color relationship with the yellowish white light in order to improve color coordinate distortion of the yellowish white light. The color shift phenomenon of the white sub-pixel W can be improved by extending toward the white sub-pixel W and partially overlapping the white sub-pixel W. FIG.

In this case, a black matrix 206 is provided between the sub-pixels R, G, B, and W.

As such, the color filters 208R, 208G, 208B, and 208B 'according to the second embodiment of the present invention may be formed of only existing red, green, and blue color resins, and do not require an additional color filter process. You can match the color coordinates of W-OLED without it. Further, since only some of the white sub-pixels W are covered by the extended blue color filter 208B ', there is an advantage that the power consumption can be lowered as compared with the above-described first embodiment.

For reference, although not shown in detail in the drawings, the W-OLED display device according to the second embodiment of the present invention includes a gate including a first gate electrode on a substrate 205 made of an insulating material such as transparent glass or plastic. A storage electrode including a line and a second gate electrode may be formed.

A gate insulating film made of silicon nitride (SiNx) or silicon dioxide (SiO ₂ ) may be formed on the gate line including the first gate electrode and the sustain electrode including the second gate electrode.

In addition, a first active layer and a second active layer made of a semiconductor may be formed on the gate insulating layer. The first active layer and the second active layer may be positioned on the first gate electrode and the second gate electrode, respectively.

Data lines, driving voltage lines, first source / drain electrodes, and second source / drain electrodes may be formed on the first active layer and the second active layer.

A passivation layer may be formed on the substrate 205 on which the data line, the driving voltage line, the first source / drain electrode, and the second source / drain electrode are formed.

The red, green, and blue color filters 208R, 208G, 208B, and 208B 'may be formed on the substrate 205.

A planarization layer may be formed on the entire surface of the substrate 205 on which the color filters 208R, 208G, 208B, and 208B 'are formed to compensate for the step difference between the color filters 208R, 208G, 208B, and 208B' and the thin film transistor.

In addition, a pixel electrode and a connecting electrode may be formed on the planarization layer. These may be made of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO), or a reflective conductive material such as aluminum, silver, or an alloy thereof.

In this case, the pixel electrode, which is an anode, is electrically connected to the second drain electrode through a second contact hole, while the connection electrode is connected to the first drain electrode and the second gate through a first contact hole and a third contact hole. It can be electrically connected between the electrodes.

A partition may be formed on the substrate 205 on which the pixel electrode is formed. In this case, the barrier rib may surround the edge of the pixel electrode like a bank to define an opening and may be made of an organic insulating material or an inorganic insulating material.

In addition, a white organic light emitting layer 207 may be formed on the substrate 205.

In this case, the white organic light emitting layer 207 may have a multilayer structure including an auxiliary layer for improving the light emitting efficiency of the light emitting layer in addition to the light emitting layer emitting light. The auxiliary layer includes an electron transport layer and a hole transport layer to balance electrons and holes, and an electron injection layer and a hole injection layer to enhance injection of electrons and holes.

A common electrode, which is a cathode, may be formed on the white organic light emitting layer 207. In this case, the common electrode receives a common voltage and may be made of a reflective conductive material including calcium (Ca), barium (Ba), magnesium (Mg), aluminum, silver, or a transparent conductive material such as ITO or IZO. .

In the W-OLED display device configured as described above, the first gate electrode connected to the gate line and the first source electrode and the first drain electrode connected to the data line include a switching thin film transistor ( switching TFT) can be configured. The second gate electrode connected to the first drain electrode, the second source electrode connected to the driving voltage line, and the second drain electrode connected to the pixel electrode include a driving thin film transistor together with a second active layer. (driving TFT) can be configured.

In addition, the pixel electrode, the white organic light emitting layer 207 and the common electrode constitute an organic light emitting diode, and the sustain electrode and the driving voltage line overlapping each other may constitute a storage capacitor.

Meanwhile, the present invention can cope with various distortions of the color coordinates of the W-OLED other than the above-mentioned yellowish, and classify the W-OLED into various groups to derive and develop various models according to the color coordinates, thereby applying the yield to the product. This can be improved, which will be described in detail with reference to the following examples.

6A and 6B are plan views and cross-sectional views illustrating one pixel of a white organic light emitting diode display device according to a third exemplary embodiment of the present invention, in which case white light is brownish. One pixel of the display element is shown as an example.

In this case, the sub-pixels R, G, W, and B constituting one pixel according to the third embodiment of the present invention are red, green, white, and blue sub-pixels (R, G, W, and B). It is possible to apply irrespective of which sub-pixels R, G, W, and B are located first as long as they have the order of.

6A and 6B, the W-OLED display device according to the third embodiment of the present invention uses red, green, and blue color filters 308R, 308G, 308G ', 308B, and 308B'. By implementing green, green and blue color coordinate distortion of the brownish white light can be improved.

In this case, the green color filters 308G and 308G 'are formed to cover the entire green sub-pixel G, and part of the green color filters 308G extend toward the white sub-pixel W, and the blue color filter 308B. , 308B ') is also formed to cover the entire blue sub-pixel B as well as to extend in part towards the white sub-pixel W. As a result, the extended green color filter 308G 'varies depending on the degree of color coordinate distortion of the white sub-pixel W and a part of the white light, but may be formed to overlap 5% to 40%, for example. The extended blue color filter 308B ′ may be formed to overlap a portion of the white sub-pixel W, for example, about 5% to 40%.

As described above, the W-OLED display device according to the third exemplary embodiment of the present invention uses the green color filters 308G and 308G 'to have a complementary color relationship with the brownish white light in order to improve color coordinate distortion of the brownish white light. ) And the blue color filters 308B and 308B ′ respectively extend toward the white sub-pixels W to partially overlap the white sub-pixels W, thereby improving color shift of the white sub-pixels W. You can do it.

In this case, a black matrix 306 is provided between the sub-pixels R, G, W, and B.

As such, the color filters 308R, 308G, 308G ', 308B, and 308B' according to the third embodiment of the present invention may be formed of existing red, green, and blue color resins, and do not require an additional color filter process. This allows you to match the color coordinates of the W-OLED at no extra cost. Further, since only a part of the white sub-pixels W is covered by the extended green color filter 308G 'and the extended blue color filter 308B', power consumption can be lowered compared with the above-described first embodiment. There is an advantage to this.

For reference, a white organic light emitting layer 307 is formed on the substrate 305 on which the red, green, and blue color filters 308R, 308G, 308G ', 308B, and 308B' are formed.

7A and 7B are plan views and cross-sectional views illustrating one pixel of a white organic light emitting diode display according to a fourth exemplary embodiment of the present invention, in which white light is bluish. One pixel of an OLED display element is shown as an example.

In this case, the sub-pixels R, W, G, and B constituting one pixel according to the fourth embodiment of the present invention are red, white, green, and blue sub-pixels (R, W, G, and B). It is possible to apply irrespective of which sub-pixels R, W, G, and B are located first as long as they have the order of.

7A and 7B, the W-OLED display device according to the fourth embodiment of the present invention uses red, green, and blue color filters 408R, 408R ', 408G, 408G', and 408B. By implementing green, green, and blue colors, the color coordinate distortion of the blue light can be improved.

In this case, the red color filters 408G and 408G 'are formed to cover the entire red sub-pixel G, and part of the red color filters 408G extend toward the white sub-pixel W, and the green color filter 408G. , 408G ') is also formed to cover the entire green sub-pixel G as well as partly extending toward the white sub-pixel W. As a result, the extended red color filter 408G 'varies depending on the degree of color coordinate distortion of the white sub-pixel W and a part of the white light, but may be formed to overlap 5% to 40%, for example. The extended green color filter 408G 'may be formed to overlap a portion of the white sub-pixel W, for example, about 5% to 40%.

As described above, the W-OLED display device according to the fourth exemplary embodiment of the present invention uses a red color filter 408G to form a complementary color relationship with the blueish white light in order to improve color coordinate distortion of the blueish white light. 408G ') and green color filters 408G and 408G' respectively extend toward white sub-pixels W to partially overlap with the white sub-pixels W, thereby causing color shift of the white sub-pixels W. It will be possible to improve.

In this case, a black matrix 406 is provided between the sub-pixels R, W, G, and B.

As such, the color filters 408R, 408R ', 408G, 408G', and 408B according to the fourth embodiment of the present invention may be formed of existing red, green, and blue color resins, and do not require an additional color filter process. This allows you to match the color coordinates of the W-OLED at no extra cost. In addition, since only some of the white sub-pixels W are covered by the extended red color filter 408G 'and the extended green color filter 408G', the power consumption can be lowered compared with the above-described first embodiment. There is an advantage to this.

For reference, a white organic light emitting layer 407 is formed on the substrate 405 on which the red, green, and blue color filters 408R, 408R ', 408G, 408G', and 408B are formed.

8A and 8B are plan views and cross-sectional views illustrating one pixel of a white organic light emitting diode display device according to a fifth exemplary embodiment of the present invention, in which white light is greenish. One pixel of the display element is shown as an example.

In this case, the sub-pixels R, G, B, and W constituting one pixel according to the fifth embodiment of the present invention are red, green, blue, and white sub-pixels (R, G, B, and W). It is possible to apply irrespective of which sub-pixels R, G, B, and W are located first as long as they have the order of.

8A and 8B, the W-OLED display device according to the fifth embodiment of the present invention uses red, green, and blue color filters 508R, 508R ', 508G, 508B, and 508B'. By implementing green, green, and blue colors, color coordinate distortion of greenish white light can be improved.

In this case, the red color filters 508G and 508G ′ may be formed to cover the entire red sub-pixel G, and part of the red color filters 508G and 508G ′ may extend toward the white sub-pixel W. , 508B ') is also formed to cover the entire blue sub-pixel B as well as to extend in part towards the white sub-pixel W. As a result, the extended red color filter 508G 'varies depending on the degree of color coordinate distortion of the white sub-pixel W and a part of the white light, but may be formed to overlap 5% to 40%, for example. The extended blue color filter 508B ′ may be formed to overlap a portion of the white sub-pixel W, for example, about 5% to 40%.

As described above, the W-OLED display device according to the fifth exemplary embodiment of the present invention uses a red color filter 508G and 508G ′ to form a complementary color relationship with the greenish white light in order to improve color coordinate distortion of the greenish white light. ) And the blue color filters 508B and 508B 'respectively extend toward the white sub-pixels W to partially overlap the white sub-pixels W, thereby improving color shift of the white sub-pixels W. You can do it.

In this case, a black matrix 506 is provided between the sub-pixels R, G, B, and W.

As such, the color filters 508R, 508R ', 508G, 508B, and 508B' according to the fifth embodiment of the present invention may be formed of existing red, green, and blue color resins, and do not require an additional color filter process. This allows you to match the color coordinates of the W-OLED at no extra cost. Further, since only a part of the white sub-pixels W are covered by the extended red color filter 508G 'and the extended blue color filter 508B', the power consumption can be lowered compared with the above-described first embodiment. There is an advantage to this.

For reference, a white organic light emitting layer 507 is formed on the substrate 505 on which the red, green, and blue color filters 508R, 508R ', 508G, 508B, and 508B' are formed.

Many details are set forth in the foregoing description but should be construed as illustrative of preferred embodiments rather than to limit the scope of the invention. Therefore, the invention should not be construed as limited to the embodiments described, but should be determined by equivalents to the appended claims and the claims.

106 ~ 506: black matrix
108B ~ 508B, 208B ', 308B', 508B ': Blue color filter
108G ~ 508G, 308G ', 408G': Green Color Filter
108R ~ 508R, 408R ', 508R': Red color filter
205 to 505: substrate 207 to 507 organic light emitting layer
R, G, B, W: Sub-pixels

Claims (13)

A substrate in which a plurality of pixels of red, green, blue, and white sub-pixels are defined;
Red, green, and blue color filters formed on the red, green, blue, and white sub-pixels; And
And a white organic light emitting layer formed on the substrate on which the red, green, and blue color filters are formed, and ordering the red, green, blue, and white sub-pixels according to the color shift of the white organic light emitting layer. A white organic light emitting diode comprising: a color filter of red, green, and blue sub-pixels having a complementary color relation to the color to be changed in color; W-OLED). The W-OLED display device of claim 1, further comprising a black matrix provided between the sub-pixels. The W-OLED display device according to claim 1, wherein when the white organic light emitting layer is yellowish, the sub-pixels are arranged in the order of red, green, blue, and white sub-pixels. The color filter of claim 3, wherein the blue color filter is formed to cover the entire blue sub-pixel and extends toward the white sub-pixel to overlap the white sub-pixel by about 10% to 80%. W-OLED display element. The W-OLED display device according to claim 1, wherein when the white organic light emitting layer is brownish, the sub-pixels are arranged in the order of red, green, white, and blue sub-pixels. The color filter of claim 5, wherein the green color filter is formed not only to cover the entire green sub-pixel, but also extends toward the white sub-pixel to overlap the white sub-pixel. A W-OLED display device, which is formed to cover the entire blue sub-pixel and extends toward the white sub-pixel so as to overlap the white sub-pixel. The W-OLED display device of claim 6, wherein each of the green color filter and the blue color filter extends toward the white sub-pixel and overlaps the white sub-pixel by about 5% to 40%. . The W-OLED display device according to claim 1, wherein when the white organic light emitting layer is bluish, the sub-pixels are arranged in order of red, white, green, and blue sub-pixels. . 10. The color filter of claim 8, wherein the red color filter is formed to cover the entire red sub-pixel and extends toward the white sub-pixel to overlap the white sub-pixel. A W-OLED display device, characterized in that it is formed to cover the entire green sub-pixel and extends toward the white sub-pixel to overlap the white sub-pixel. 10. The W-OLED display device of claim 9, wherein each of the red color filter and the green color filter extends toward the white sub-pixel and overlaps the white sub-pixel by about 5% to 40%. . The W-OLED display device according to claim 1, wherein when the white organic light emitting layer is greenish, the sub-pixels are arranged in the order of red, green, blue, and white sub-pixels. 12. The color filter of claim 11, wherein the red color filter is formed not only to cover the entire red sub-pixel, but also extends toward the white sub-pixel so as to overlap the white sub-pixel. A W-OLED display device, which is formed to cover the entire blue sub-pixel and extends toward the white sub-pixel so as to overlap the white sub-pixel. The W-OLED display device of claim 12, wherein each of the red color filter and the blue color filter extends toward the white sub-pixel and overlaps the white sub-pixel by about 5% to 40%. .

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