KR102250502B1 - Organic light emitting display panel and organic light emitting display device using the same - Google Patents

Abstract

The present invention relates to an organic light-emitting display panel using a bottom emission method and a color filter, and an organic light-emitting display device using the same, and in particular, in a bank area between an adjacent color subpixel adjacent to a white subpixel and the white subpixel. An object of the present invention is to provide an organic light emitting display panel and an organic light emitting display device using the same, in which at least one auxiliary color filter having a color different from that of the adjacent color filter provided in the adjacent color subpixel is disposed.

Description

Organic light emitting display panel and organic light emitting display device using the same {ORGANIC LIGHT EMITTING DISPLAY PANEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME}

The present invention relates to an organic light-emitting display panel and an organic light-emitting display device using the same, and more particularly, to an organic light-emitting display panel using a bottom emission method and a color filter, and an organic light-emitting display device using the same.

Flat panel displays include Liquid Crystal Display Device (LCD), Plasma Display Panel Device (PDP), and Organic Light Emitting Display Device (OLED), and recently, electrophoretic displays. Electrophoretic display devices (EPDs) are also widely used.

Among them, organic light-emitting display devices are attracting attention as next-generation flat panel display devices because they have low power consumption as self-luminous devices, high-speed response speed, high luminous efficiency, high luminance, and wide viewing angle.

The organic light-emitting display panel applied to the organic light-emitting display device may be configured in a top emission method in which light generated from the organic light-emitting diode is emitted to the outside through an upper substrate, or the light generated from the organic light-emitting diode is transmitted to the outside. It may be configured in a bottom emission method that is emitted to the lower substrate.

1 is an exemplary view showing a cross section of an organic light emitting display panel using a conventional bottom emission method.

As shown in FIG. 1, a conventional organic light emitting display panel using a bottom emission method and using a color filter includes a substrate 11, a gate insulating film 12, an insulating film 14, a color filter 15, and a flat film. (16), a white organic light-emitting diode 20 and a bank 19, which are composed of an anode 17, an organic light-emitting unit 18, and a cathode 19, to output white light. In particular, a cross-sectional portion of the organic light emitting display panel illustrated in FIG. 1 represents a blue subpixel that outputs blue light by arranging a blue filter 15.

Both the blue sub-pixel and the white sub-pixel include a white organic light-emitting diode 20 that outputs white light. The white light output from the white organic light-emitting diode 20 disposed on the blue sub-pixel is emitted to the outside through the blue color filter, so that the blue sub-pixel outputs blue light.

Each of the red and green subpixels outputs red light and green light by a red color filter and a green color filter.

In the conventional organic light emitting display panel as described above, the light output from the blue or green subpixel or the white organic light emitting diode 20 disposed in the red subpixel adjacent to the white subpixel is a blue color filter or a green color. After passing through a filter or a red color filter, it may be emitted to the outside through an adjacent white subpixel.

Accordingly, the white light output from the white subpixel is interfered with by blue, green, or red light introduced from the adjacent blue subpixel or green subpixel or red subpixel, and accordingly, the color purity of the white light may be deteriorated.

As described above, in a conventional organic light emitting display panel using a color filter, since the color purity of white light is lowered, the image quality and color reproducibility of an organic light emitting display device using a conventional organic light emitting display panel decreases. Accordingly, the organic light emitting display device Quality is deteriorating.

The present invention is proposed in order to solve the above-described problem, and in the bank area between the adjacent color subpixel adjacent to the white subpixel and the white subpixel, an auxiliary color filter provided in the adjacent color subpixel and a color different from that of the adjacent color subpixel is provided. An object of the present invention is to provide an organic light emitting display panel in which at least one color filter is disposed and an organic light emitting display device using the same.

The organic light emitting display panel according to the present invention includes white subpixels provided with a white organic light emitting diode outputting white light, a white organic light emitting diode outputting white light, and color subpixels provided with a color filter, the color subpixel Among them, at least one auxiliary color filter having a color different from the adjacent color filter provided in the adjacent color subpixel is disposed in a bank area between the white subpixel and the adjacent color subpixel adjacent to the white subpixel.

An organic light-emitting display device according to the present invention includes an organic light-emitting display panel and a panel driver for driving the organic light-emitting display panel, and the organic light-emitting display panel includes white subpixels provided with white organic light-emitting diodes and white organic light-emitting Includes color sub-pixels provided with a diode and a color filter, and among the color sub-pixels, a bank region between the white sub-pixel and the adjacent color sub-pixel adjacent to the white sub-pixel is provided in the adjacent color sub-pixel. At least one auxiliary color filter having a color different from that of the adjacent color filter is disposed.

According to the present invention, since the subpixels are optically separated, a phenomenon in which color purity is deteriorated due to interference and light leakage occurring when the subpixels emit light can be prevented.

Further, according to the present invention, a phenomenon in which spots are generated due to a difference in color sense depending on the viewing angle can be improved.

Accordingly, according to the present invention, the color gamut of the organic light emitting display device can be improved, and spots according to the viewing angle can be reduced.

1 is an exemplary view showing a cross section of an organic light emitting display panel using a conventional bottom emission method.
2 is an exemplary view showing the configuration of an organic light emitting display device according to the present invention.
3 is an exemplary view showing a plan view of an organic light emitting display panel according to the present invention.
4 is another exemplary view showing a plan view of an organic light emitting display panel according to the present invention.
5 is an exemplary view schematically showing a cross section of an organic light emitting display panel according to the present invention.
6 is still another cross-sectional view schematically illustrating a cross-section of an organic light emitting display panel according to the present invention.
7 is a graph illustrating a spectrum of white light applied to an organic light emitting display panel according to an exemplary embodiment of the present invention.
8A to 8D are graphs illustrating a spectrum of light passing through an adjacent color filter and an auxiliary color filter applied to the organic light emitting display panel according to the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is an exemplary view showing the configuration of an organic light emitting display device according to the present invention. 3 is an exemplary view showing a plan view of the organic light emitting display panel according to the present invention, and in particular, a part of the plan view of the organic light emitting display panel shown in FIG. 2. 4 is another exemplary view showing a plan view of the organic light emitting display panel according to the present invention, and in particular, a plan view of the organic light emitting display panel in which the auxiliary color filter 130 is provided on the outer surface of the white subpixel W. Represents a part of.

The organic light-emitting display device according to the present invention includes an organic light-emitting display panel 100 and panel driving units 200, 300, and 400 for driving the organic light-emitting display panel, as shown in FIG. 2.

First, the panel driver is a gate driver 200 for sequentially supplying scan pulses to gate lines GL1 to GLg provided in the organic light emitting display panel 100, and to the organic light emitting display panel 100. A data driver 300 for supplying data voltages to the provided data lines DL1 to DLd, and a timing controller 400 for controlling the gate driver 200 and the data driver 300 are included.

First, the timing controller 400 uses a vertical synchronization signal, a horizontal synchronization signal, and a clock supplied from an external system (not shown) to control the gate driver 200 and the data driver. A data control signal (DCS) for controlling 300 is generated.

Next, the data driver 300 converts the image data input from the timing controller 400 into an analog data voltage, and applies a data voltage for one horizontal line for every horizontal period in which the scan pulse is supplied to the gate line. Supply to the data lines. That is, the data driver 300 converts the image data into a data voltage using gamma voltages supplied from a gamma voltage generator (not shown), and then outputs the data voltage to the data lines.

Finally, the gate driver 200 applies a scan pulse to the gate lines GL1 to GLg provided in the organic light emitting display panel 100 in response to the gate control signal input from the timing controller 400. It is supplied sequentially. Accordingly, switching transistors provided in subpixels to which the scan pulse is input are turned on so that an image may be output to each of the subpixels.

Second, the organic light-emitting display panel 100 includes white sub-pixels W provided with a white organic light-emitting diode outputting white light, and a white organic light-emitting diode and color filter outputting white light, as shown in FIG. 3. It includes color subpixels R, G, and B provided.

In the organic light emitting display panel 100, a subpixel P 110 may be formed in a region where a plurality of gate lines GL1 to GLg and a plurality of data lines DL1 to DLd cross each other. Each of the white sub-pixel (W), red sub-pixel (R), green sub-pixel (G), and blue sub-pixel (B) is the sub-pixel, and the red sub-pixel (R), the green sub-pixel (G), and Each of the blue subpixels B is the color subpixel.

Among the color subpixels R, G, B, a color subpixel adjacent to the white subpixel W (hereinafter, simply referred to as'adjacent color subpixel') and the white subpixel W In the bank area, at least one auxiliary color filter 130 having a color different from that of an adjacent color filter provided in the adjacent color subpixel is disposed.

For example, in FIG. 3, the blue sub-pixel B and the green sub-pixel G may be the adjacent color sub-pixels. In more detail, the adjacent color sub-pixel means a color sub-pixel adjacent to the white sub-pixel W.

In addition, in FIG. 3, the auxiliary color filter 130 is shown as a single line, but as described above, a bank region between the adjacent color subpixel and the white subpixel W has different colors. Two or more auxiliary color filters 130 may be disposed.

The auxiliary color filter 130 may be disposed to overlap an outer portion of the adjacent color filter extending to the bank area.

The auxiliary color filter 130 may be inserted into the outer portion of the adjacent color filter extending to the bank area.

In addition, in FIG. 3, the auxiliary color filter 130 is provided only between the white sub-pixel W and the adjacent color sub-pixel, but as shown in FIG. 4, two white sub-pixels adjacent to each other. At least two or more auxiliary color filters of different colors may be disposed in the bank area between the (Ws).

Each of the subpixels 110 includes a white organic light-emitting diode outputting white light and a driving unit for driving the white organic light-emitting diode.

The white organic light-emitting diode includes an anode formed of a conductive and transparent material, an organic light-emitting unit stacked on the anode and outputting white light, and a cathode stacked on the organic light-emitting unit.

The driver is connected to the data line DL and the gate line GL to control driving of the organic light emitting diode OLED. To this end, the driving unit may include a driving transistor, a switching transistor, and a storage capacitor.

When the scan pulse is supplied to the gate line GL, the driver controls an amount of current supplied to the white organic light emitting diode according to a data voltage supplied to the data line DL.

To this end, the driving transistor is connected between the first power source and the white organic light emitting diode, and the switching transistor is connected between the driving transistor and the data line DL and the gate line GL. Further, the anode of the white organic light emitting diode is connected to the first power source through the driving transistor, and the cathode is connected to a second power source.

The white organic light emitting diode outputs white light having a predetermined luminance corresponding to the magnitude of the current supplied from the driving transistor.

In addition to the driving transistor, the switching transistor, and the storage capacitor, the driving unit may further include a plurality of capacitors and a plurality of transistors.

5 is an exemplary view schematically showing a cross-section of an organic light emitting display panel according to the present invention, in particular, an exemplary view schematically showing a cross-section taken along line A-A' shown in FIGS. 3 and 4.

Hereinafter, the structure and function of the auxiliary color filter 130 will be described with reference to the cross section shown in FIG. 5.

As described above, among the color subpixels R, G, B, the bank region 190 between the white subpixel W and the adjacent color subpixel adjacent to the white subpixel W At least one auxiliary color filter 130 having a color different from that of an adjacent color filter provided in the adjacent color subpixel is disposed.

In particular, in FIG. 5, an organic light-emitting display panel in which a blue sub-pixel (B) is disposed to the left of the white sub-pixel (W) and a green sub-pixel (G) is disposed to the right of the white sub-pixel (W). A cross section of 100 is shown. In this case, each of the blue sub-pixel (B) and the green sub-pixel (G) is referred to as a blue adjacent color sub-pixel and a green adjacent color sub-pixel.

First, the blue adjacent color subpixel (B) outputting blue light includes a substrate 111, a blue adjacent color filter 115B provided on the insulating layers 112 and 114 provided on the substrate 111, and the At least one of the blue adjacent color filters 115B disposed on the blue adjacent color filter 115B disposed in the bank area 190 between the blue adjacent color subpixel B and the white subpixel W It has an auxiliary color filter (130). In addition, the blue adjacent color subpixel (B) is a planarization layer 116 covering the blue adjacent color filter 115B and the auxiliary color filter 130, and the white organic color provided on the planarization layer 116. It is provided on the light emitting diode 120 and the flat layer 116 and is provided at a position corresponding to the bank region 190 to separate the blue adjacent color subpixel (B) from the white subpixel (W). It includes a bank 119.

In this case, the insulating layers 112 and 114 may include a gate insulating layer 112 covering the substrate 111 and a protective layer 114 covering the gate insulating layer 112. Various electrode lines 113 for supplying various signals required for driving the white organic light emitting diode 120 may be provided between the gate insulating layer 112 and the protective layer 114.

A portion of the blue adjacent color filter 115B disposed in the bank area 190 corresponding to the position of the bank 119 (hereinafter, simply referred to as'outer portion') includes the blue adjacent color filter 115B. At least one auxiliary color filter 130 having a color different from that is disposed. For example, in FIG. 5, one auxiliary color filter 130 is disposed on the outer portion, but two auxiliary color filters 130 may be disposed on the outer portion.

When one of the auxiliary color filters 130 is disposed on the outer side of the blue adjacent color filter 115B, as shown in FIG. 5, the auxiliary color filter 130 may have a red color or a green color. You can also have.

In addition, when the two auxiliary color filters 130 are disposed on the outer side of the blue adjacent color filter 115B, the first auxiliary color filter in contact with the blue adjacent color filter 115B has red color, and the The second auxiliary color filter in contact with the first auxiliary color filter may have a green color. In this case, the first auxiliary color filter may have green color, and the second auxiliary color filter may have red color. In more detail, the color of the at least one auxiliary color filter 130 has a color different from that of the blue adjacent color filter 115B.

Further, a plurality of the first and second auxiliary color filters may be alternately disposed on the outer portion of the blue adjacent color filter 115B.

In addition, the auxiliary color filter 130 in contact with the blue adjacent color filter 115B may have various colors other than blue, in addition to red and green.

Next, the green adjacent color subpixel (G) outputting green light includes a substrate 111, a green adjacent color filter 115G provided on the insulating layers 112 and 114 provided on the substrate 111, and the green color. Among the adjacent color filters 115G, at least one or more of the green adjacent color filters 115G disposed in the bank area 190 between the green adjacent color subpixels G and the white subpixels W It has an auxiliary color filter (130). In addition, the green adjacent color subpixel G is a flat layer 116 covering the green adjacent color filter 115G and the auxiliary color filter 130, and the white organic layer provided on the flat layer 116. It is provided on the light emitting diode 120 and the flat layer 116, and is provided at a position corresponding to the bank region 190 to separate the green adjacent color subpixel (G) and the white subpixel (W). It includes a bank 119.

In this case, the insulating layers 112 and 114 may include a gate insulating layer 112 covering the substrate 111 and a protective layer 114 covering the gate insulating layer 112. Various electrode lines 113 for supplying various signals required for driving the white organic light emitting diode 120 may be provided between the gate insulating layer 112 and the protective layer 114.

A portion of the green adjacent color filter 115G disposed in the bank area 190 corresponding to the position of the bank 119, that is, the outer portion has a color different from that of the green adjacent color filter 115G. At least one auxiliary color filter 130 is disposed. For example, in FIG. 5, one auxiliary color filter 130 is disposed on the outer portion, but two auxiliary color filters 130 may be disposed on the outer portion.

When one auxiliary color filter 130 is disposed on the outer portion of the green adjacent color filter 115G as shown in FIG. 5, the auxiliary color filter 130 may have red color or blue color. May be.

In addition, when the two auxiliary color filters 130 are disposed on the outer portion of the green adjacent color filter 115G, the first auxiliary color filter in contact with the green adjacent color filter 115G has red color, and the first auxiliary color filter has red color. The second auxiliary color filter in contact with the first auxiliary color filter may have a blue color. In this case, the first auxiliary color filter may have a blue color, and the second auxiliary color filter may have a red color. To further explain, the color of the at least one auxiliary color filter 130 has a color different from that of the green adjacent color filter 115G.

In addition, a plurality of the first and second auxiliary color filters may be alternately disposed on the outer portion of the green adjacent color filter 115G.

In addition, the auxiliary color filter 130 in contact with the green adjacent color filter 115G may have various colors other than green in addition to red and blue.

Finally, the white sub-pixel W outputting white light includes a substrate 111, insulating layers 112 and 114 provided on the substrate 111, a flat layer 116 covering the insulating layer, and the flat layer ( 116 is provided on the white organic light emitting diode 120 and the flat layer 116, and is provided at a position corresponding to the bank region 190 to form the white subpixel W as the blue subpixel. It includes a pixel B and a bank 119 that separates it from the green sub-pixel G.

In this case, the insulating layers 112 and 114 may include a gate insulating layer 112 covering the substrate 111 and a protective layer 114 covering the gate insulating layer 112. Various electrode lines 113 for supplying various signals required for driving the white organic light emitting diode 120 may be provided between the gate insulating layer 112 and the protective layer 114.

The color filters 115B and 115G and the auxiliary color filter 130 are not provided in the white sub-pixel W.

The bank area 190 corresponding to the bank 119 separated from the blue sub-pixel (B) and the green sub-pixel (G) among the outer portions of the white sub-pixel (W) includes the description and FIGS. As shown in FIG. 5, the auxiliary color filter 130 is disposed.

In this case, a bank area 190 corresponding to a bank 119 which is disposed on the outer portion of the white sub-pixel W shown in FIG. 5 and separates the white sub-pixel W from another white sub-pixel As described above and shown in FIG. 4, at least two or more auxiliary color filters 130 of different colors may be disposed.

More specifically, at least one auxiliary color filter 130 is disposed between the white sub-pixel (W) and the blue sub-pixel (B) and between the white sub-pixel (W) and the green sub-pixel (G) However, at least two auxiliary color filters 130 of different colors should be disposed between two adjacent white subpixels W.

As described above, each of the white sub-pixel (W), the blue sub-pixel (B), and the green sub-pixel (G) includes the substrate 111, the insulating layers 112 and 114, and the electrode line 113. ), the adjacent color filters 115G and 115B, the flat layer 116, the white organic light emitting diode 120, and the bank 119.

The substrate 111 may be formed of a transparent glass substrate, or may be formed of a transparent synthetic resin substrate or a transparent synthetic resin film.

The insulating layers 112 and 114 may include the gate insulating layer 112 and the protective layer 114. The insulating layer may be formed of a material such as SiO2, SiNx, or SiOx. The insulating layer serves to insulate various electrodes formed in the subpixel from each other.

The electrode line 113 may be formed of a material having excellent conductivity, such as copper.

The adjacent color filters 115G and 115B and the auxiliary color filter 130 may be formed of a photoresist having a color.

The flattening layer 116 and the bank 119 are, for example, polyimide (PI), polyamide (PA), acrylic resin, benzocyclobutene (BCB). ) And an organic material such as a phenol resin, but is not limited thereto.

The white organic light-emitting diode 120 includes an anode 117 formed of a conductive and transparent material, an organic light-emitting unit 118 stacked on the anode and outputting white light, and a cathode stacked on the organic light-emitting unit 118. ) (119).

The anode 117 may be formed of, for example, indium tin oxide (ITO).

The organic light emitting part 118 may include a hole transport layer (HTL), an emission material layer (EML), and an electron transport layer (ETL). A hole injection layer (HIL) may be formed between the anode and the hole transport film (HTL) in order to improve the luminous efficiency of the organic light emitting part 118, and the cathode and the electron transport film ( Between ETL), an electron injection layer (EIL) may be formed. In particular, the organic light emitting unit 118 is configured to output white light.

The cathode 119 functions as a reflector so that the white light generated by the organic light emitting unit 118 can be output to the outside through the anode. In this case, the cathode 119 may be formed of a metal such as aluminum (Al), tantalum (Ta), and silver (Ag). An upper substrate (not shown) for sealing the white organic light emitting diode 120 may be attached to an upper end of the cathode 119.

The white organic light emitting diode 120 is formed in a bottom emission method in which light is output to the outside through the anode 117.

The anode 117 constituting the white organic light emitting diode 120 is connected to the driving transistor and outputs white light corresponding to the amount of current flowing through the driving transistor.

6 is still another cross-sectional view schematically showing a cross-section of an organic light emitting display panel according to the present invention, and in particular, an exemplary view schematically showing cross-sections taken along line B-B' shown in FIGS. 3 and 4.

Hereinafter, the structures of the adjacent color filter 115 and the auxiliary color filter 130 will be described with reference to FIG. 6.

First, referring to (a), the adjacent color filter 115 and the auxiliary color filter 130 are formed on the insulating layer 114.

The auxiliary color filter 130 may be formed to overlap the outer portion of the adjacent color filter 115. In this case, a first photoresist having a first color is deposited on the insulating layer 114, and the adjacent color filter 115 is formed by performing an exposure process and an etching process on the first photoresist. .

Thereafter, a second photoresist having a second color is deposited on the outer portion of the adjacent color filter 115, and the auxiliary color filter 130 is formed by performing an exposure process and an etching process on the second photoresist. do. The auxiliary color filter 130 may be formed by a full open photo mask.

In this case, as shown in (a), the auxiliary color filter 130 formed on the outer portion of the adjacent color filter 115 may cover a part of the outer portion of the adjacent color filter 115. Accordingly, the auxiliary color filter 130 may overlap the outer portion of the adjacent color filter 115.

Next, referring to (b), the auxiliary color filter 130 may be inserted into an outer portion of the adjacent color filter 115.

In this case, after the adjacent color filter 115 is formed by the first photo register, the adjacent color filter 115 is formed using a full open photo mask or a slit pattern mask. ) Is divided into two regions 115a and 115b, and the second photoresist is inserted between the two regions to form the auxiliary color filter 130.

Next, referring to (c), the auxiliary color filter 130 may be inserted into an outer portion of the adjacent color filter 115.

In this case, after the adjacent color filter 115 is formed by the first photoresistor, the outer portion of the adjacent color filter 115 is formed by using a transmittance adjustment pattern mask. ). In this case, an area 115c in which the adjacent color filter remains exists between the two areas 115a and 115b. The second photoresist is inserted in the region 115c where the adjacent color filter remains to form the auxiliary color filter 130.

Next, referring to (d), two auxiliary color filters 130a and 130b may be formed on the outer portion of the adjacent color filter 115, and three or more auxiliary color filters may be formed. Two or more of the auxiliary color filters 130a and 130b may be formed on the outer portion of the adjacent color filter 115 using any one of (a), (b), and (c).

Next, the auxiliary color filter 130 may be formed on the outer portion of the adjacent color filter 115 in the shape shown in (e).

For example, when the auxiliary color filter 130 is formed in the shape shown in (b), the second photoresist inserted between the two regions 115a and 115b is the adjacent color filter 115 It may overflow in the outermost direction of ). When the exposure and etching processes are performed in this state, the auxiliary color filter 130 may be formed in the form shown in (e).

In this case, the auxiliary color filter 130 includes a first auxiliary color filter unit 131 inserted between the two areas 115a and 115b and a second auxiliary color filter 115 disposed at the outermost side of the adjacent color filter 115. It includes an auxiliary color filter unit 132.

Finally, the auxiliary color filter 130 may be formed in the outer portion of the adjacent color filter 115 in the shape shown in (f).

For example, when the auxiliary color filter 130 is formed in the shape shown in (c), the second photoresist inserted between the two regions 115a and 115b is the adjacent color filter 115 It may overflow in the outermost direction of ). When the exposure and etching processes are performed in this state, the auxiliary color filter 130 may be formed in the form shown in (f).

In this case, the auxiliary color filter 130 includes a first auxiliary color filter unit 131 inserted between the two areas 115a and 115b and a second auxiliary color filter 115 disposed at the outermost side of the adjacent color filter 115. It includes an auxiliary color filter unit 132.

7 is a graph illustrating a spectrum of white light applied to the organic light emitting display panel according to the present invention, and FIGS. 8A to 8D are adjacent color filters and auxiliary colors applied to the organic light emitting display panel according to the present invention. These are graphs for explaining the spectrum of light passing through the filter.

First, in FIG. 7, spectra of red light (R), green light (G), and blue light (B) constituting white light are shown. Red light (R), green light (G), and blue light (B) having a wavelength as shown in FIG. 7 are mixed to form white light.

Next, FIG. 8A shows a spectrum of light passing through the two color filters when a color filter having red and a color filter having blue are combined. Referring to FIG. 8A, when the red color filter and the blue color filter are combined, light between 380 and 480 and between 630 and 780 is output, but in this case, it can be seen that the transmittance of the output light is 0.1 or less. I can.

For example, as shown in FIG. 5, when the blue adjacent color filter 115B having blue and the auxiliary color filter 130 having red are adjacent to each other, a white color provided in the blue sub-pixel B Among the white light output from the organic light emitting diode 120, the light output in the direction of the white sub-pixel W through the blue adjacent color filter 115B and the auxiliary color filter 130 is the blue adjacent color filter ( 115B) is only 0.1% of the light passing through. Accordingly, it may be less likely that the white light output through the white sub-pixel W is mixed with the light output from the blue sub-pixel B. Accordingly, the purity of white light output from the white sub-pixel W may be improved.

Next, FIG. 8B shows a spectrum of light passing through the two color filters when a color filter having a red color and a color filter having a green color are combined. Referring to FIG. 8B, when the red color filter and the green color filter are combined, light between 680 and 780 is output, but in this case, it can be seen that the transmittance of the output light is 0.2 or less.

For example, as shown in FIG. 5, when the green adjacent color filter 115G having green and the auxiliary color filter 130 having red are adjacent to each other, the white color provided in the green sub-pixel G Among the white light output from the organic light emitting diode 120, the light output in the direction of the white subpixel W through the green adjacent color filter 115G and the auxiliary color filter 130 is the green adjacent color filter 115G. ), it is only 0.2% of the light passing through. Accordingly, the possibility that the light output from the green subpixel G is mixed with the white light output through the white subpixel W may be reduced. Accordingly, the purity of white light output from the white sub-pixel W may be improved.

Next, FIG. 8C shows a spectrum of light passing through the two color filters when a green color filter and a blue color filter are combined. Referring to FIG. 8C, when the green color filter and the blue color filter are combined, light between 480 and 580 is output. In this case, it can be seen that the transmittance of the output light is 0.2 or less.

Finally, FIG. 8D shows a spectrum of light passing through the three color filters when a color filter having red, a color filter having green, and a color filter having blue are combined. Referring to FIG. 8D, when a color filter having red, a color filter having green, and a color filter having blue are combined, only light between 750 and 780 is output, but in this case, it can be seen that the transmittance of the output light is 0.1 or less. I can.

Therefore, when the adjacent color filter 115 and the auxiliary color filter 130 are formed in a combination shown in FIGS. 8A to 8D, light flowing from the adjacent color subpixel to the white subpixel can be blocked as much as possible. Accordingly, the purity of white light output from the white sub-pixel W may be improved.

In particular, as shown in FIG. 8D, when a color filter having three colors is combined, it can be seen that the transmittance of light passing through the three color filters is minimized.

Accordingly, two auxiliary color filters 130 having two colors other than the color of the adjacent color filter 115 may be formed outside the white sub-pixel W.

In this case, at least two of the auxiliary color filters configured in a combination illustrated in FIGS. 8A to 8D may be formed between two adjacent white subpixels. Accordingly, the inflow of light between adjacent white subpixels is blocked, so that the amount of light output from the white subpixels can be kept constant.

In the above description, it has been described that the auxiliary color filter is described only between the white sub-pixel W and the adjacent color sub-pixels and between the white sub-pixels W. However, the auxiliary color filter 130 may be formed between all subpixels.

According to the present invention as described above, at least one auxiliary color having a color different from the color of the subpixel in an overlap type or an insert type outside each of the red subpixel, the green subpixel, and the blue subpixel A filter 130 may be formed. Since the auxiliary color filter 130 performs a light blocking function, light output from the white organic light emitting diode constituting a specific subpixel is not emitted to the outside through adjacent subpixels. Accordingly, spots caused by color abnormalities in the organic light emitting display device may be reduced, and color reproducibility may be improved.

In addition, as described with reference to FIGS. 8A to 8D, since the light transmittance can be reduced to 0.1 or less by a combination of at least two colors, the auxiliary color filter 130 and the adjacent color filter 115 If) is adjacent, light does not flow into the adjacent subpixel.

Those skilled in the art to which the present invention pertains will be able to understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features thereof. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not limiting. The scope of the present invention is indicated by the claims to be described later rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention. do.

100: panel 110: pixel
200: gate driver 300: data driver
400: timing controller

Claims (5)

White subpixels including white organic light-emitting diodes that output white light; And
Including a white organic light-emitting diode outputting white light and color subpixels equipped with a color filter,
In the bank area between the white subpixel and the adjacent color subpixel adjacent to the white subpixel among the color subpixels, at least one auxiliary color filter having a color different from the adjacent color filter provided in the adjacent color subpixel is provided. Is placed above,
An organic light emitting display panel in which at least two auxiliary color filters of different colors are disposed in a bank area between two adjacent white subpixels. The method of claim 1,
The auxiliary color filter is an organic light emitting display panel that is superimposed on an outer portion of the adjacent color filter or inserted into the outer portion. The method of claim 1,
An organic light-emitting display panel in which an outer portion of the adjacent color filter is divided into two regions, and the auxiliary color filter is disposed between the two regions. The method of claim 1,
The adjacent color subpixel,
At least one auxiliary color filter disposed at an outer portion of the adjacent color filter disposed in a bank area between the adjacent color subpixel and the white subpixel;
A flat layer covering the adjacent color filter and the auxiliary color filter;
An organic light emitting diode provided on the planarization layer; And
An organic light-emitting display panel comprising a bank provided on the planarization layer and disposed at a position corresponding to the bank area to separate the adjacent color subpixels from the white subpixels. The organic light emitting display panel according to any one of claims 1 to 4; And
A panel driver driving the organic light emitting display panel,
The organic light emitting display panel,
White sub-pixels with white organic light-emitting diodes; And
Including a white organic light-emitting diode and color subpixels equipped with a color filter,
In the bank area between the white subpixel and the adjacent color subpixel adjacent to the white subpixel among the color subpixels, at least one auxiliary color filter having a color different from the adjacent color filter provided in the adjacent color subpixel is provided. Is placed above,
An organic light emitting display device in which at least two auxiliary color filters of different colors are disposed in a bank area between two adjacent white subpixels.

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