Organic light emitting diode display device including wavelength converting layers

An organic light emitting diode display device includes a substrate having first, second, third and fourth subpixels; first, second and third color filter layers in the second, third and fourth subpixels, respectively, on the substrate; a first wavelength converting layer in the first subpixel on the substrate and second and third wavelength converting layers on the first and second color filter layers, respectively; and a light emitting diode in each of the first, second, third and fourth subpixels over the first, second and third wavelength converting.

CROSS-REFERENCE TO RELATED APPLICATION

The present application claims the priority benefit of Korean Patent Application No. 10-2019-0160623 filed on Dec. 5, 2019, which is hereby incorporated by reference in its entirety.

BACKGROUND

Field of the Disclosure

The present disclosure relates to an organic light emitting diode display device, and more particularly, to an organic light emitting diode display device including a wavelength converting layer.

Description of the Background

Recently, a flat panel display (FPD) having a thin profile, a light weight and a low power consumption has been developed and applied to various fields.

In an organic light emitting diode (OLED) display device among flat panel displays, charges are injected into a light emitting layer between a cathode of an electron injecting electrode and an anode of a hole injecting electrode to form an exciton, and the exciton transitions from an excited state to a ground state to emit a light.

A white OLED display device used as a display device of a high resolution and a small size for a virtual reality (VR) or an augmented reality (AR) or a display device of a big size for a television has been researched and developed.

The white OLED display device includes a light emitting layer emitting a white colored light and a color filter layer transmitting a light of a specific color (specific wavelength). For example, the white OLED display device includes a white subpixel, a red subpixel, a green subpixel and a blue subpixel emitting a white colored light, a red colored light, a green colored light and a blue colored light, respectively.

In the white OLED display device, the light emitting layer has a tandem structure including a plurality of stacks for emitting a white colored light of a relatively high color temperature and a relatively high luminance, and one of the plurality of stacks includes two or more dopants for emitting a light of two or more colors.

However, a difference in a charge distribution according to a current density and a difference in a white spectrum occur due to a combination of the two or more dopants in the one of the plurality of stacks. As a result, a difference in a white color temperature of gray levels clearly occurs in the white OLED display device.

To solve the above problems, a material for the light emitting layer emitting the white colored light may be changed or a composition ratio of materials for the light emitting layer emitting the white colored light may be adjusted. However, the change of the material or the adjustment range of the composition ratio is intensely limited and has a high level of difficulty.

SUMMARY

Accordingly, the present disclosure is directed to an organic light emitting diode display device that substantially obviates one or more of the problems due to limitations and disadvantages of the related art.

Also, the present disclosure is to provide an organic light emitting diode display device where a white spectrum of a relatively high color temperature and a relatively high luminance is stably obtained by converting a white colored light of a light emitting layer into a light of a different color using a wavelength converting layer.

In addition, the present disclosure is to provide an organic light emitting diode display device where various white spectrums are obtained and a color reproducibility is improved by converting a white colored light of a light emitting layer into a light of a different color using a wavelength converting layer and by transmitting a light of a predetermined color of the white colored light of the light emitting layer using a color filter layer.

Additional features and advantages of the disclosure will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the disclosure. These and other advantages of the disclosure will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

To achieve these and other advantages and in accordance with the purpose of the present disclosure, as embodied and broadly described herein, an organic light emitting diode display device includes: a substrate having first, second, third and fourth subpixels; first, second and third color filter layers in the second, third and fourth subpixels, respectively, on the substrate; a first wavelength converting layer in the first subpixel on the substrate and second and third wavelength converting layers on the first and second color filter layers, respectively; and a light emitting diode in each of the first, second, third and fourth subpixels over the first, second and third wavelength converting.

DETAILED DESCRIPTION

Advantages and features of the present disclosure, and implementation methods thereof will be clarified through following example aspects described with reference to the accompanying drawings. The present disclosure may, however, be embodied in different forms and should not be construed as limited to the example aspects set forth herein. Rather, these example aspects are provided so that this disclosure may be sufficiently thorough and complete to assist those skilled in the art to fully understand the scope of the present disclosure. Further, the present disclosure is only defined by scopes of claims.

A shape, a size, a ratio, an angle, and a number disclosed in the drawings for describing aspects of the present disclosure are merely an example. Thus, the present disclosure is not limited to the illustrated details. Like reference numerals refer to like elements throughout. In the following description, when the detailed description of the relevant known function or configuration is determined to unnecessarily obscure an important point of the present disclosure, the detailed description of such known function or configuration may be omitted. In a case where terms “comprise,” “have,” and “include” described in the present specification are used, another part may be added unless a more limiting term, such as “only,” is used. The terms of a singular form may include plural forms unless referred to the contrary.

In construing an element, the element is construed as including an error or tolerance range even where no explicit description of such an error or tolerance range. In describing a position relationship, when a position relation between two parts is described as, for example, “on,” “over,” “under,” or “next,” one or more other parts may be disposed between the two parts unless a more limiting term, such as “just” or “direct(ly),” is used.

In describing a time relationship, when the temporal order is described as, for example, “after,” “subsequent,” “next,” or “before,” a case which is not continuous may be included unless a more limiting term, such as “just,” “immediate(ly),” or “direct(ly),” is used.

In describing elements of the present disclosure, the terms like “first,” “second,” “A,” “B,” “(a),” and “(b)” may be used. These terms are merely for differentiating one element from another element, and the essence, sequence, order, or number of a corresponding element should not be limited by the terms. Also, when an element or layer is described as being “connected,” “coupled,” or “adhered” to another element or layer, the element or layer can not only be directly connected or adhered to that other element or layer, but also be indirectly connected or adhered to the other element or layer with one or more intervening elements or layers “disposed” between the elements or layers, unless otherwise specified.

In the description of aspects, when a structure is described as being positioned “on or above” or “under or below” another structure, this description should be construed as including a case in which the structures contact each other as well as a case in which a third structure is disposed therebetween. The size and thickness of each element shown in the drawings are given merely for the convenience of description, and aspects of the present disclosure are not limited thereto.

Reference will now be made in detail to the present disclosure, examples of which are illustrated in the accompanying drawings.

FIG.1is a view showing an organic light emitting diode display device according to a first aspect of the present disclosure, andFIG.2is a view showing a subpixel of an organic light emitting diode display device according to a first aspect of the present disclosure.

InFIG.1, an organic light emitting diode (OLED) display device110includes a timing controlling part180, a data driving part182, a gate driving part184and a display panel186.

The timing controlling part180generates a gate control signal, a data control signal and an image data using an image signal and a plurality of timing signals transmitted from an external system such as a graphic card or a television system. The timing controlling part180supplies the data control signal and the image data to the data driving part182and supplies the gate control signal to the gate driving part184.

The data driving part182generates a data signal (a data voltage) using the data control signal and the image data transmitted from the timing controlling part180and supplies the data voltage to a data line DL of the display panel186.

The gate driving part184generates a gate signal (a gate voltage) using the gate control signal transmitted from the timing controlling part180and supplies the gate voltage to a gate line GL of the display panel186.

The display panel186displays an image using the gate signal and the data signal. The display panel186includes the gate line GL, the data line DL and a plurality of subpixels SP (shown inFIG.2) connected to the gate line GL and the data line DL.

For example, each of the plurality of subpixels SP may be defined by the gate line GL and the data line DL crossing each other, and the plurality of subpixels SP may include first, second, third and fourth subpixels SP1, SP2, SP3and SP4corresponding to white, red, green and blue colors, respectively.

Each of the plurality of subpixels SP includes a plurality of thin film transistors (TFTs). For example, each of the plurality of subpixels SP may include a switching TFT, a driving TFT, a storage capacitor and a light emitting diode.

InFIG.2, each of the plurality of subpixels SP of the OLED display device110according to the present disclosure includes a switching TFT Ts, a driving TFT Td, a storage capacitor Cs and a light emitting diode De.

The switching TFT Ts supplies the data signal of the data line DL to the driving TFT Td according to the gate signal of the gate line GL, and the driving TFT Td supplies a high level voltage ELVDD to the light emitting diode De according to the data signal applied to a gate electrode through the switching TFT Ts.

The light emitting diode De displays various gray levels using various currents according to voltage differences between a voltage corresponding to the data signal and a low level voltage ELVSS.

FIG.3is a cross-sectional view showing an organic light emitting diode display device according to a first aspect of the present disclosure.FIG.3exemplarily shows a bottom emission type organic light emitting diode display device.

InFIG.3, the OLED display device110includes a substrate120, insulating layers122,124and126, color filter layers132,134and136, wavelength converting layers146,148and150, a first electrode160, a light emitting layer162and a second electrode164.

For example, the first to fourth subpixels SP1to SP4may constitute a single pixel. The first subpixel SP1may have an area ratio of about 0.3 (30%) to about 0.7 (70%) with respect to the single pixel, and each of the second, third and fourth subpixels SP2, SP3and SP4may have an area ratio of about 0.1 (10%) to about 0.3 (30%).

A gate insulating layer122, an interlayer insulating layer124and a passivation layer126may be disposed in the first, second, third and fourth subpixels SP1, SP2, SP3and SP4on the substrate120, and the switching TFT Ts (shown inFIG.2), the driving TFT Td (shown inFIG.2) and the storage capacitor Cs (shown inFIG.2) may be disposed among the gate insulating layer122, the interlayer insulating layer124and the passivation layer126.

For example, the gate insulating layer122may be disposed between a gate electrode and a semiconductor layer of the switching TFT Ts and the driving TFT Td, and the interlayer insulating layer124may be disposed between the gate electrode and a source electrode and between the gate electrode and a drain electrode of the switching TFT Ts and the driving TFT Td. The passivation layer126may be disposed on the source electrode and the drain electrode of the switching TFT Ts and the driving TFT Td.

First, second and third color filter layers132,134and136may be disposed in the second, third and fourth subpixels SP2, SP3and SP4on the passivation layer126. For example, the first, second and third color filter layers132,134and136may be selectively penetrated by and may selectively transmit a red colored light, a green colored light and a blue colored light, respectively.

A first wavelength converting layer146is disposed in the first subpixel SP1on the passivation layer126, and second and third wavelength converting layers148and150are disposed on the first and second color filter layers132and134, respectively.

The first wavelength converting layer146includes first and second wavelength converting materials, and the second wavelength converting layer148includes a third wavelength converting material. The third wavelength converting layer150includes a fourth wavelength converting material.

The first, second, third and fourth wavelength converting materials of the first, second and third wavelength converting layers146,148and150absorb a light of a short wavelength and emits a light of a long wavelength.

For example, the first, second, third and fourth wavelength converting materials may include a quantum dot or a nanocomposite capable of adjusting an absorption wavelength band and an emission wavelength band according to a concentration or a sort of substances.

The first, second, third and fourth wavelength converting materials may have an absorption wavelength band of about 350 nm to about 650 nm and an emission wavelength band of about 450 nm to about 750 nm. An absorption ratio by wavelength and an emission ratio by wavelength of the first, second, third and fourth wavelength converting materials may be adjusted according to a composition ratio or a sort of substances.

The first and third wavelength converting materials may be the same as each other, and the second and fourth wavelength converting materials may be the same as each other.

The first and second wavelength converting materials may have different absorption wavelength bands and different emission wavelength bands from each other, and the third and fourth wavelength converting materials may have different absorption wavelength bands and different emission wavelength bands from each other.

For example, the first and third wavelength converting materials may have an absorption wavelength band of about 450 nm to about 650 nm and an emission wavelength band of about 550 nm to about 750 nm, and the second and fourth wavelength converting materials may have an absorption wavelength band of about 350 nm to about 550 nm and an emission wavelength band of about 450 nm to about 650 nm.

As a result, the first and third wavelength converting materials may absorb a blue colored light and may emit a red colored light, and the second and fourth wavelength converting materials may absorb a blue colored light and may emit a green colored light.

In another aspect, a blue color filter layer may be disposed on each of the second and third wavelength converting layers148and150of the second and third subpixels SP2and SP3. As a result, an incident light to the second and third wavelength converting layers148and150may be limited to the blue colored light to increase a wavelength conversion efficiency.

The first wavelength converting layer146may include a first wavelength converting pattern142containing the first wavelength converting material and a second wavelength converting pattern144containing the second wavelength converting material.

FIGS.4,5and6are plan views showing a first wavelength converting layer of an organic light emitting diode display device according to first, second and third aspects, respectively, of the present disclosure.

InFIG.4, the first wavelength converting layer146including the first wavelength converting pattern142containing the first wavelength converting material and the second wavelength converting pattern144containing the second wavelength converting material is disposed in the first subpixel SP1of the OLED display device110according to a first aspect of the present disclosure.

The first and second wavelength converting patterns142and144may have a shape of a plurality of bars and may be disposed parallel to and alternate with each other.

As a result, the first subpixel SP1may be classified into a first region where the first wavelength converting material is disposed, a second region where the second wavelength converting material is disposed and a third region between the first and second wavelength converting patterns142and144where the first and second wavelength converting materials are not disposed. A white spectrum of a white colored light emitted from the first subpixel SP1may be variously adjusted by changing area ratios of the first to third regions.

InFIG.5, a first wavelength converting layer246including a first wavelength converting pattern242containing a first wavelength converting material and a second wavelength converting pattern244containing a second wavelength converting material is disposed in a first subpixel SP1of an OLED display device according to a second aspect of the present disclosure.

The first and second wavelength converting patterns242and244may have a shape of a net.

As a result, the first subpixel SP1may be classified into a first region where the first wavelength converting material is disposed, a second region where the second wavelength converting material is disposed and a third region between the first and second wavelength converting patterns242and244where the first and second wavelength converting materials are not disposed. A white spectrum of a white colored light emitted from the first subpixel SP1may be variously adjusted by changing area ratios of the first to third regions.

InFIG.6, a first wavelength converting layer346including a first wavelength converting pattern342containing a first wavelength converting material and a second wavelength converting pattern344containing a second wavelength converting material is disposed in a first subpixel SP1of an OLED display device according to a third aspect of the present disclosure.

The first and second wavelength converting patterns342and344may have a shape of a rectangle and may be separated from each other to be disposed parallel to each other and at side portions of the first subpixel SP1.

As a result, the first subpixel SP1may be classified into a first region where the first wavelength converting material is disposed, a second region where the second wavelength converting material is disposed and a third region between the first and second wavelength converting patterns342and344where the first and second wavelength converting materials are not disposed. A white spectrum of a white colored light emitted from the first subpixel SP1may be variously adjusted by changing area ratios of the first to third regions.

Referring again toFIG.3, a first planarizing layer152is disposed on the first, second and third wavelength converting layers146,148and150and the third color filter layer136.

For example, the first planarizing layer152may include an organic insulating material such as a photo acryl.

A first electrode160, a light emitting layer162and a second electrode164are sequentially disposed in the first, second, third and fourth subpixels SP1, SP2, SP3and SP4on the first planarizing layer152.

The first electrode160, the light emitting layer162and the second electrode164constitute a light emitting diode emitting a white colored light. The first electrode160may be disposed in each of the first, second, third and fourth subpixels SP1, SP2, SP3and SP4, and each of the light emitting layer162and the second electrode164may be disposed in a whole of the first, second, third and fourth subpixels SP1, SP2, SP3and SP4.

The first and second electrodes160and164may be an anode and a cathode, respectively.

Although not shown, an encapsulating layer and an encapsulating substrate may be disposed on the second electrode164.

The light emitting layer162may have a plurality of stacks.

FIGS.7and8are cross-sectional views showing a light emitting diode of an organic light emitting diode display device according to first and fourth aspects, respectively, of the present disclosure.

InFIG.7, the light emitting diode of the OLED display device110according to a first aspect of the present disclosure includes the first electrode160, the light emitting layer162and the second electrode164.

The light emitting layer162includes first, second and third emitting material layers (EMLs)166,168and170sequentially disposed on the first electrode160. The first, second and third EMLs166,168and170may emit a first blue colored light, a yellow-green colored light and a second blue colored light, respectively.

Although not shown, a hole injecting layer (HIL) and a first hole transporting layer (HTL) may be disposed between the first electrode160and the first EML166.

A first electron transporting layer (ETL), a first charge generating layer (CGL) and a second HTL may be disposed between the first EML166and the second EML168.

A second ETL, a second CGL and a third HTL may be disposed between the second EML168and the third EML170.

A third ETL and an electron injecting layer (EIL) may be disposed between the third EML170and the second electrode164.

The HIL, the first HTL, the first EML166and the first ETL may constitute a first stack for emitting a first blue colored light, and the second HTL, the second EML168and the second ETL may constitute a second stack for emitting a yellow-green colored light. The third HTL, the third EML170, the third ETL and the EIL may constitute a third stack for emitting a second blue colored light.

As a result, the light emitting diode of the OLED display device110according to a first aspect of the present disclosure may emit a white colored light where the first blue colored light, the yellow-green colored light and the second blue colored light of the first, second and third stacks are mixed.

InFIG.8, a light emitting diode of an OLED display device according to a fourth aspect of the present disclosure includes a first electrode460, a light emitting layer462and a second electrode464.

The light emitting layer462includes first, second, third and fourth emitting material layers (EMLs)466,468,470and472sequentially disposed on the first electrode460. The first, second, third and fourth EMLs466,468,470and472may emit a first blue colored light, a yellow-green colored light, a green colored light and a second blue colored light, respectively.

Although not shown, a hole injecting layer (HIL) and a first hole transporting layer (HTL) may be disposed between the first electrode460and the first EML466.

A first electron transporting layer (ETL), a first charge generating layer (CGL) and a second HTL may be disposed between the first EML466and the second EML468.

A second ETL, a second CGL and a third HTL may be disposed between the third EML470and the fourth EML472.

A third ETL and an electron injecting layer (EIL) may be disposed between the fourth EML472and the second electrode464.

The HIL, the first HTL, the first EML466and the first ETL may constitute a first stack for emitting a first blue colored light, and the second HTL, the second EML468, the third EML470and the second ETL may constitute a second stack for emitting a yellow-green colored light and a green colored light. The third HTL, the fourth EML472, the third ETL and the EIL may constitute a third stack for emitting a second blue colored light.

As a result, the light emitting diode of the OLED display device according to a fourth aspect of the present disclosure may emit a white colored light where the first blue colored light, the yellow-green colored light, the green colored light and the second blue colored light of the first, second, third and fourth stacks are mixed.

In the first subpixel SP1, the first light L1of the light emitting layer162passes through a gap region between the first and second wavelength converting patterns142and144of the first wavelength converting layer146without conversion to be emitted as the first light L1. The first light L1is converted by the first wavelength converting pattern142of the first wavelength converting layer146to be emitted as the second light L2, and the first light L1is converted by the second wavelength converting pattern144of the first wavelength converting layer146to be emitted as the third light L3.

The first light L1of the light emitting layer162is converted into the fourth light L4where the first light L1passing through the gap region between the first and second wavelength converting patterns142and144, the second light L2due to the first wavelength converting pattern142and the third light L3due to the second wavelength converting pattern144are mixed, and the fourth light L4is emitted from the first subpixel SP1.

In the second subpixel SP2, the first light L1of the light emitting layer162is converted into the second light L2by the second wavelength converting layer148, and the second light L2of the second wavelength converting layer148is converted by the first color filter layer132to be emitted as the fifth light L5.

The first light L1of the light emitting layer162is converted into the fifth light L5by the second wavelength converting layer148and the first color filter layer132, and the fifth light L5is emitted from the second subpixel SP2.

In the third subpixel SP3, the first light L1of the light emitting layer162is converted into the third light L3by the third wavelength converting layer150, and the third light L3of the third wavelength converting layer150is converted by the second color filter layer134to be emitted as the sixth light L6.

The first light L1of the light emitting layer162is converted into the sixth light L6by the third wavelength converting layer150and the second color filter layer134, and the sixth light L6is emitted from the third subpixel SP3.

In the fourth subpixel SP4, the first light L1of the light emitting layer162is converted by the third color filter layer136to be emitted as the seventh light L7.

The first light L1of the light emitting layer162is converted into the seventh light L7by the third color filter layer136, and the seventh light L7is emitted from the fourth subpixel SP4.

FIG.9is a view showing a spectrum of a fourth light of a first subpixel of an organic light emitting diode display device according to a first aspect of the present disclosure, andFIG.10is a view showing spectrums of fifth, sixth and seventh lights of second, third and fourth subpixels of an organic light emitting diode display device according to a first aspect of the present disclosure.

InFIG.9, the fourth light L4emitted from the first subpixel SP1of the OLED display device110according to a first aspect of the present disclosure may be a white colored light including a first component C1corresponding to a blue colored light, a second component C2corresponding to a green colored light and a third component C3corresponding to a red colored light.

Spectrums (intensities with respect to wavelengths) of the second and third components C2and C3may be variously adjusted by changing a composition ratio or a sort of substances of the first and second wavelength converting materials of the first and second wavelength converting patterns142and144of the first wavelength converting layer146. As a result, a spectrum of the fourth light L4emitted from the first subpixel SP1may be variously adjusted.

InFIG.10, the fifth, sixth and seventh lights L5, L6and L7emitted from the second, third and fourth subpixels SP2, SP3and SP4of the OLED display device110according to a first aspect of the present disclosure may be red, green and blue colored lights, respectively.

A spectrum of the fifth light L5emitted from the second subpixel SP2may be variously adjusted by changing a composition ratio or a sort of substances of the third wavelength converting material of the second wavelength converting layer148.

A spectrum of the sixth light L6emitted from the third subpixel SP3may be variously adjusted by changing a composition ratio or a sort of substances of the fourth wavelength converting material of the third wavelength converting layer150.

In the OLED display device110according to a first aspect of the present disclosure, the white spectrum of the fourth light L4of the first subpixel SP1, the red spectrum of the fifth light L5of the second subpixel SP2and the green spectrum of the sixth light L6of the third subpixel SP3may be variously adjusted by changing a composition ratio or a sort of substances of the first, second, third and fourth wavelength converting materials. Accordingly, various white spectrums of a high color temperature and a high luminance may be obtained.

In addition, since the white colored light of the light emitting layer162is converted into the red colored light and the green colored light using the second and third wavelength converting patterns148and150of the second and third subpixels SP2and SP3, thicknesses of the first and second color filter layers132and134of the second and third subpixel SP2and SP3is reduced. As a result, a light emitting efficiency is improved.

Further, since the red, green and blue colored lights are emitted through the first, second and third color filters132,134and136, respectively, of the second, third and fourth subpixels SP2, SP3and SP4, a color reproducibility is improved.

In another aspect, a light extraction efficiency may be improved using a microlens.

FIG.11is a cross-sectional view showing an organic light emitting diode display device according to a fifth aspect of the present disclosure. Illustrations on parts of the fifth aspect the same as those of the first aspect will be omitted.

InFIG.11, the OLED display device510includes a substrate520, insulating layers522,524and526, color filter layers532,534and536, wavelength converting layers546,548and550, a plurality of microlenses538, a first electrode560, a light emitting layer562and a second electrode564.

For example, the first to fourth subpixels SP1to SP4may constitute a single pixel. The first subpixel SP1may have an area ratio of about 0.3 (30%) to about 0.7 (70%) with respect to the single pixel, and each of the second, third and fourth subpixels SP2, SP3and SP4may have an area ratio of about 0.1 (10%) to about 0.3 (30%).

A gate insulating layer522, an interlayer insulating layer524and a passivation layer526may be disposed in the first, second, third and fourth subpixels SP1, SP2, SP3and SP4on the substrate520, and the switching TFT Ts (shown inFIG.2), the driving TFT Td (shown inFIG.2) and the storage capacitor Cs (shown inFIG.2) may be disposed among the gate insulating layer522, the interlayer insulating layer524and the passivation layer526.

For example, the gate insulating layer522may be disposed between a gate electrode and a semiconductor layer of the switching TFT Ts and the driving TFT Td, and the interlayer insulating layer524may be disposed between the gate electrode and a source electrode and between the gate electrode and a drain electrode of the switching TFT Ts and the driving TFT Td. The passivation layer526may be disposed on the source electrode and the drain electrode of the switching TFT Ts and the driving TFT Td.

First, second and third color filter layers532,534and536may be disposed in the second, third and fourth subpixels SP2, SP3and SP4on the passivation layer526.

A first wavelength converting layer546is disposed in the first subpixel SP1on the passivation layer526, and second and third wavelength converting layers548and550are disposed on the first and second color filter layers532and534, respectively.

The first wavelength converting layer546includes first and second wavelength converting materials, and the second wavelength converting layer548includes a third wavelength converting material. The third wavelength converting layer550includes a fourth wavelength converting material.

For example, the first, second, third and fourth wavelength converting materials may include a quantum dot or a nanocomposite capable of adjusting an absorption wavelength band and an emission wavelength band according to a concentration or a sort of substances.

The first, second, third and fourth wavelength converting materials may have an absorption wavelength band of about 350 nm to about 650 nm and an emission wavelength band of about 450 nm to about 750 nm. An absorption ratio by wavelength and an emission ratio by wavelength of the first, second, third and fourth wavelength converting materials may be adjusted according to a composition ratio or a sort of substances.

For example, the first and third wavelength converting materials may absorb a blue colored light and may emit a red colored light, and the second and fourth wavelength converting materials may absorb a blue colored light and may emit a green colored light.

A first planarizing layer552is disposed on the first, second and third wavelength converting layers546,548and550and the third color filter layer536, and a plurality of microlenses538having an uneven shape are disposed on a top surface of the first planarizing layer552.

For example, the first planarizing layer552and the plurality of microlenses538may include an organic insulating material such as a photo acryl.

In addition, the first planarizing layer552and the plurality of microlenses538may be formed through a single photolithographic process using a half transmissive mask including a transmissive area, a half transmissive area and a blocking area.

The first planarizing layer552and the plurality of microlenses538may have the same refractive index. For example, each of the first planarizing layer552and the plurality of microlenses538may have a refractive index of about 1.45 to about 1.55.

Each of the plurality of microlenses538may have a shape of a convex lens.

Although the plurality of microlenses538are spaced apart from each other in the fifth aspect, at least two of the plurality of microlenses538may contact each other in another aspect.

A first electrode560, a light emitting layer562and a second electrode564are sequentially disposed in the first, second, third and fourth subpixels SP1, SP2, SP3and SP4on the first planarizing layer552. The first electrode560, the light emitting layer562and the second electrode564constitute a light emitting diode emitting a white colored light.

The first electrode560, the light emitting layer562and the second electrode564may have an uneven shape due to the plurality of microlenses538.

In the OLED display device510according to a fifth aspect of the present disclosure, a light blocked by a total reflection at an interface between the first electrode560and the first planarizing layer552is minimized due to the plurality of microlenses538. As a result, a light emitting efficiency is improved.

In addition, the white spectrum of the first subpixel SP1, the red spectrum of the second subpixel SP2and the green spectrum of the third subpixel SP3may be variously adjusted by changing a composition ratio or a sort of substances of the first, second, third and fourth wavelength converting materials. Accordingly, various white spectrums of a high color temperature and a high luminance may be obtained.

Further, since the white colored light of the light emitting layer562is converted into the red colored light and the green colored light using the second and third wavelength converting patterns548and550of the second and third subpixels SP2and SP3, thicknesses of the first and second color filter layers532and534of the second and third subpixel SP2and SP3is reduced. As a result, a light emitting efficiency is improved.

Moreover, since the red, green and blue colored lights are emitted through the first, second and third color filters532,534and536, respectively, of the second, third and fourth subpixels SP2, SP3and SP4, a color reproducibility is improved.

In another aspect, a plurality of microlenses may have a shape of a concave lens and may be disposed to contact each other.

FIG.12is a cross-sectional view showing an organic light emitting diode display device according to a sixth aspect of the present disclosure. Illustrations on parts of the sixth aspect the same as those of the first aspect will be omitted.

InFIG.12, the OLED display device610includes a substrate620, insulating layers622,624and626, color filter layers632,634and636, wavelength converting layers646,648and650, a plurality of microlenses638, a first electrode660, a light emitting layer662and a second electrode664.

For example, the first to fourth subpixels SP1to SP4may constitute a single pixel. The first subpixel SP1may have an area ratio of about 0.3 (30%) to about 0.7 (70%) with respect to the single pixel, and each of the second, third and fourth subpixels SP2, SP3and SP4may have an area ratio of about 0.1 (10%) to about 0.3 (30%).

A gate insulating layer622, an interlayer insulating layer624and a passivation layer626may be disposed in the first, second, third and fourth subpixels SP1, SP2, SP3and SP4on the substrate620, and the switching TFT Ts (shown inFIG.2), the driving TFT Td (shown inFIG.2) and the storage capacitor Cs (shown inFIG.2) may be disposed among the gate insulating layer622, the interlayer insulating layer624and the passivation layer626.

For example, the gate insulating layer622may be disposed between a gate electrode and a semiconductor layer of the switching TFT Ts and the driving TFT Td, and the interlayer insulating layer624may be disposed between the gate electrode and a source electrode and between the gate electrode and a drain electrode of the switching TFT Ts and the driving TFT Td. The passivation layer626may be disposed on the source electrode and the drain electrode of the switching TFT Ts and the driving TFT Td.

First, second and third color filter layers632,634and636may be disposed in the second, third and fourth subpixels SP2, SP3and SP4on the passivation layer626.

A first wavelength converting layer646is disposed in the first subpixel SP1on the passivation layer626, and second and third wavelength converting layers648and650are disposed on the first and second color filter layers632and634, respectively.

The first wavelength converting layer646includes first and second wavelength converting materials, and the second wavelength converting layer648includes a third wavelength converting material. The third wavelength converting layer650includes a fourth wavelength converting material.

For example, the first, second, third and fourth wavelength converting materials may include a quantum dot or a nanocomposite capable of adjusting an absorption wavelength band and an emission wavelength band according to a concentration or a sort of substances.

The first, second, third and fourth wavelength converting materials may have an absorption wavelength band of about 350 nm to about 650 nm and an emission wavelength band of about 450 nm to about 750 nm. An absorption ratio by wavelength and an emission ratio by wavelength of the first, second, third and fourth wavelength converting materials may be adjusted according to a composition ratio or a sort of substances.

For example, the first and third wavelength converting materials may absorb a blue colored light and may emit a red colored light, and the second and fourth wavelength converting materials may absorb a blue colored light and may emit a green colored light.

A first planarizing layer652is disposed on the first, second and third wavelength converting layers646,648and650and the third color filter layer636, and a plurality of microlenses638having an uneven shape are disposed on a top surface of the first planarizing layer652.

For example, the first planarizing layer652and the plurality of microlenses638may include an organic insulating material such as a photo acryl.

In addition, the first planarizing layer652and the plurality of microlenses638may be formed through a single photolithographic process using a half transmissive mask including a transmissive area, a half transmissive area and a blocking area.

The first planarizing layer652and the plurality of microlenses638may have the same refractive index. For example, each of the first planarizing layer652and the plurality of microlenses638may have a refractive index of about 1.45 to about 1.55.

Each of the plurality of microlenses638may have a shape of a concave lens and may be disposed to contact each other.

Although the plurality of microlenses638contact each other in the sixth aspect, at least two of the plurality of microlenses638may be spaced apart from each other in another aspect.

A first electrode660, a light emitting layer662and a second electrode664are sequentially disposed in the first, second, third and fourth subpixels SP1, SP2, SP3and SP4on the first planarizing layer652. The first electrode660, the light emitting layer662and the second electrode664constitute a light emitting diode emitting a white colored light.

The first electrode660, the light emitting layer662and the second electrode664may have an uneven shape due to the plurality of microlenses638.

In the OLED display device610according to a sixth aspect of the present disclosure, a light blocked by a total reflection at an interface between the first electrode660and the first planarizing layer652is minimized due to the plurality of microlenses638. As a result, a light emitting efficiency is improved.

In addition, the white spectrum of the first subpixel SP1, the red spectrum of the second subpixel SP2and the green spectrum of the third subpixel SP3may be variously adjusted by changing a composition ratio or a sort of substances of the first, second, third and fourth wavelength converting materials. Accordingly, various white spectrums of a high color temperature and a high luminance may be obtained.

Further, since the white colored light of the light emitting layer662is converted into the red colored light and the green colored light using the second and third wavelength converting patterns648and650of the second and third subpixels SP2and SP3, thicknesses of the first and second color filter layers632and634of the second and third subpixel SP2and SP3is reduced. As a result, a light emitting efficiency is improved.

Moreover, since the red, green and blue colored lights are emitted through the first, second and third color filters632,634and636, respectively, of the second, third and fourth subpixels SP2, SP3and SP4, a color reproducibility is improved.

FIG.13is a cross-sectional view showing an organic light emitting diode display device according to a seventh aspect of the present disclosure. Illustrations on parts of the seventh aspect the same as those of the first aspect will be omitted.

InFIG.13, the OLED display device710includes a substrate720, insulating layers722,724and726, color filter layers732,734and736, wavelength converting layers746,748and750, a plurality of microlenses738, a first electrode760, a light emitting layer762and a second electrode764.

For example, the first to fourth subpixels SP1to SP4may constitute a single pixel. The first subpixel SP1may have an area ratio of about 0.3 (30%) to about 0.7 (70%) with respect to the single pixel, and each of the second, third and fourth subpixels SP2, SP3and SP4may have an area ratio of about 0.1 (10%) to about 0.3 (30%).

A gate insulating layer722, an interlayer insulating layer724and a passivation layer726may be disposed in the first, second, third and fourth subpixels SP1, SP2, SP3and SP4on the substrate720, and the switching TFT Ts (shown inFIG.2), the driving TFT Td (shown inFIG.2) and the storage capacitor Cs (shown inFIG.2) may be disposed among the gate insulating layer722, the interlayer insulating layer724and the passivation layer726.

For example, the gate insulating layer722may be disposed between a gate electrode and a semiconductor layer of the switching TFT Ts and the driving TFT Td, and the interlayer insulating layer724may be disposed between the gate electrode and a source electrode and between the gate electrode and a drain electrode of the switching TFT Ts and the driving TFT Td. The passivation layer726may be disposed on the source electrode and the drain electrode of the switching TFT Ts and the driving TFT Td.

First, second and third color filter layers732,734and736may be disposed in the second, third and fourth subpixels SP2, SP3and SP4on the passivation layer726.

A first wavelength converting layer746is disposed in the first subpixel SP1on the passivation layer726, and second and third wavelength converting layers748and750are disposed on the first and second color filter layers732and734, respectively.

The first wavelength converting layer746includes first and second wavelength converting materials, and the second wavelength converting layer748includes a third wavelength converting material. The third wavelength converting layer750includes a fourth wavelength converting material.

For example, the first, second, third and fourth wavelength converting materials may include a quantum dot or a nanocomposite capable of adjusting an absorption wavelength band and an emission wavelength band according to a concentration or a sort of substances.

The first, second, third and fourth wavelength converting materials may have an absorption wavelength band of about 350 nm to about 650 nm and an emission wavelength band of about 450 nm to about 750 nm. An absorption ratio by wavelength and an emission ratio by wavelength of the first, second, third and fourth wavelength converting materials may be adjusted according to a composition ratio or a sort of substances.

For example, the first and third wavelength converting materials may absorb a blue colored light and may emit a red colored light, and the second and fourth wavelength converting materials may absorb a blue colored light and may emit a green colored light.

A first planarizing layer752is disposed on the first, second and third wavelength converting layers746,748and750and the third color filter layer736, and a plurality of microlenses738having an uneven shape are disposed on a top surface of the first planarizing layer752.

For example, the first planarizing layer752and the plurality of microlenses738may include an organic insulating material such as a photo acryl.

The first planarizing layer752and the plurality of microlenses738may have the different refractive indexes. For example, a refractive index of the first planarizing layer752may be greater than a refractive index of the plurality of microlenses738.

For example, the first planarizing layer752may have a refractive index of about 1.45 to about 1.55, and the plurality of microlenses738may have a refractive index equal to or smaller than about 1.4.

Although each of the plurality of microlenses738exemplarily has a shape of a convex lens in the seventh aspect, each of the plurality of microlenses738may have a shape of a concave lens in another aspect.

Although the plurality of microlenses738are spaced apart from each other in the seventh aspect, at least two of the plurality of microlenses738may contact each other in another aspect.

A first electrode760, a light emitting layer762and a second electrode764are sequentially disposed in the first, second, third and fourth subpixels SP1, SP2, SP3and SP4on the first planarizing layer752. The first electrode760, the light emitting layer762and the second electrode764constitute a light emitting diode emitting a white colored light.

The first electrode760, the light emitting layer762and the second electrode764may have an uneven shape due to the plurality of microlenses738.

In the OLED display device710according to a seventh aspect of the present disclosure, a light blocked by a total reflection at an interface between the first electrode760and the first planarizing layer752is minimized due to the plurality of microlenses738. As a result, a light emitting efficiency is improved.

In addition, the white spectrum of the first subpixel SP1, the red spectrum of the second subpixel SP2and the green spectrum of the third subpixel SP3may be variously adjusted by changing a composition ratio or a sort of substances of the first, second, third and fourth wavelength converting materials. Accordingly, various white spectrums of a high color temperature and a high luminance may be obtained.

Further, since the white colored light of the light emitting layer762is converted into the red colored light and the green colored light using the second and third wavelength converting patterns748and750of the second and third subpixels SP2and SP3, thicknesses of the first and second color filter layers732and734of the second and third subpixel SP2and SP3is reduced. As a result, a light emitting efficiency is improved.

Moreover, since the red, green and blue colored lights are emitted through the first, second and third color filters732,734and736, respectively, of the second, third and fourth subpixels SP2, SP3and SP4, a color reproducibility is improved.

FIG.14is a cross-sectional view showing an organic light emitting diode display device according to an eighth aspect of the present disclosure. Illustrations on parts of the eighth aspect the same as those of the first aspect will be omitted.

InFIG.14, the OLED display device810includes a substrate820, insulating layers822,824and826, color filter layers832,834and836, wavelength converting layers846,848and850, a plurality of microlenses838, a first electrode860, a light emitting layer862and a second electrode864.

For example, the first to fourth subpixels SP1to SP4may constitute a single pixel. The first subpixel SP1may have an area ratio of about 0.3 (30%) to about 0.7 (70%) with respect to the single pixel, and each of the second, third and fourth subpixels SP2, SP3and SP4may have an area ratio of about 0.1 (10%) to about 0.3 (30%).

A gate insulating layer822, an interlayer insulating layer824and a passivation layer826may be disposed in the first, second, third and fourth subpixels SP1, SP2, SP3and SP4on the substrate820, and the switching TFT Ts (shown inFIG.2), the driving TFT Td (shown inFIG.2) and the storage capacitor Cs (shown inFIG.2) may be disposed among the gate insulating layer822, the interlayer insulating layer824and the passivation layer826.

For example, the gate insulating layer822may be disposed between a gate electrode and a semiconductor layer of the switching TFT Ts and the driving TFT Td, and the interlayer insulating layer824may be disposed between the gate electrode and a source electrode and between the gate electrode and a drain electrode of the switching TFT Ts and the driving TFT Td. The passivation layer826may be disposed on the source electrode and the drain electrode of the switching TFT Ts and the driving TFT Td.

First, second and third color filter layers832,834and836may be disposed in the second, third and fourth subpixels SP2, SP3and SP4on the passivation layer826.

A plurality of microlenses838having an uneven shape are disposed on the passivation layer826in the first subpixel SP1and on the first, second and third color filter layers832,834and836, and a first planarizing layer840is disposed on the plurality of microlenses838.

First, second and third wavelength converting layers846,848and850are disposed on the first planarizing layer840in the first, second and third subpixels SP1, SP2and SP3, respectively.

The first wavelength converting layer846includes first and second wavelength converting materials, and the second wavelength converting layer848includes a third wavelength converting material. The third wavelength converting layer850includes a fourth wavelength converting material.

For example, the first, second, third and fourth wavelength converting materials may include a quantum dot or a nanocomposite capable of adjusting an absorption wavelength band and an emission wavelength band according to a concentration or a sort of substances.

The first, second, third and fourth wavelength converting materials may have an absorption wavelength band of about 350 nm to about 650 nm and an emission wavelength band of about 450 nm to about 750 nm. An absorption ratio by wavelength and an emission ratio by wavelength of the first, second, third and fourth wavelength converting materials may be adjusted according to a composition ratio or a sort of substances.

For example, the first and third wavelength converting materials may absorb a blue colored light and may emit a red colored light, and the second and fourth wavelength converting materials may absorb a blue colored light and may emit a green colored light.

A second planarizing layer852is disposed on the first, second and third wavelength converting layers846,848and850and on the first planarizing layer840of the fourth subpixel SP4.

For example, the first and second planarizing layers840and852and the plurality of microlenses838may include an organic insulating material such as a photo acryl.

The first and second planarizing layers840and852may have the same refractive index, and the first and second planarizing layers840and852and the plurality of microlenses838may have the different refractive indexes.

For example, the first and second planarizing layers840and852may have a refractive index of about 1.45 to about 1.55, and the plurality of microlenses838may have a refractive index equal to or smaller than about 1.4.

Although each of the plurality of microlenses838exemplarily has a shape of a convex lens in the eighth aspect, each of the plurality of microlenses838may have a shape of a concave lens in another aspect.

Although the plurality of microlenses838are spaced apart from each other in the eighth aspect, at least two of the plurality of microlenses838may contact each other in another aspect.

A first electrode860, a light emitting layer862and a second electrode864are sequentially disposed in the first, second, third and fourth subpixels SP1, SP2, SP3and SP4on the second planarizing layer852. The first electrode860, the light emitting layer862and the second electrode864constitute a light emitting diode emitting a white colored light.

In the OLED display device810according to an eighth aspect of the present disclosure, a light blocked by a total reflection at an interface between the first planarizing layer840and the substrate820and at an interface between the first planarizing layer840and the color filter layers832,834and836is minimized due to the plurality of microlenses838. As a result, a light emitting efficiency is improved.

In addition, the white spectrum of the first subpixel SP1, the red spectrum of the second subpixel SP2and the green spectrum of the third subpixel SP3may be variously adjusted by changing a composition ratio or a sort of substances of the first, second, third and fourth wavelength converting materials. Accordingly, various white spectrums of a high color temperature and a high luminance may be obtained.

Further, since the white colored light of the light emitting layer862is converted into the red colored light and the green colored light using the second and third wavelength converting patterns848and850of the second and third subpixels SP2and SP3, thicknesses of the first and second color filter layers832and834of the second and third subpixel SP2and SP3is reduced. As a result, a light emitting efficiency is improved.

Moreover, since the red, green and blue colored lights are emitted through the first, second and third color filters832,834and836, respectively, of the second, third and fourth subpixels SP2, SP3and SP4, a color reproducibility is improved.

FIG.15is a cross-sectional view showing an organic light emitting diode display device according to a ninth aspect of the present disclosure. Illustrations on parts of the ninth aspect the same as those of the first aspect will be omitted.

InFIG.15, the OLED display device910includes a substrate920, insulating layers922,924and926, color filter layers932,934and936, wavelength converting layers946,948and950, a plurality of microlenses938, a first electrode960, a light emitting layer962and a second electrode964.

For example, the first to fourth subpixels SP1to SP4may constitute a single pixel. The first subpixel SP1may have an area ratio of about 0.3 (30%) to about 0.7 (70%) with respect to the single pixel, and each of the second, third and fourth subpixels SP2, SP3and SP4may have an area ratio of about 0.1 (10%) to about 0.3 (30%).

A gate insulating layer922, an interlayer insulating layer924and a passivation layer926may be disposed in the first, second, third and fourth subpixels SP1, SP2, SP3and SP4on the substrate920, and the switching TFT Ts (shown inFIG.2), the driving TFT Td (shown inFIG.2) and the storage capacitor Cs (shown inFIG.2) may be disposed among the gate insulating layer922, the interlayer insulating layer924and the passivation layer926.

For example, the gate insulating layer922may be disposed between a gate electrode and a semiconductor layer of the switching TFT Ts and the driving TFT Td, and the interlayer insulating layer924may be disposed between the gate electrode and a source electrode and between the gate electrode and a drain electrode of the switching TFT Ts and the driving TFT Td. The passivation layer926may be disposed on the source electrode and the drain electrode of the switching TFT Ts and the driving TFT Td.

A plurality of microlenses938having an uneven shape are disposed on the passivation layer926in the first, second, third and fourth subpixels SP1, SP2, SP3and SP4.

First, second and third color filter layers932,934and936may be disposed in the second, third and fourth subpixels SP2, SP3and SP4on the plurality of microlenses938.

A first planarizing layer940is disposed on the plurality of microlenses938of the first subpixel SP1and on the first, second and third color filter layers932,934and936.

First, second and third wavelength converting layers946,948and950are disposed on the first planarizing layer940in the first, second and third subpixels SP1, SP2and SP3, respectively.

The first wavelength converting layer946includes first and second wavelength converting materials, and the second wavelength converting layer948includes a third wavelength converting material. The third wavelength converting layer950includes a fourth wavelength converting material.

For example, the first, second, third and fourth wavelength converting materials may include a quantum dot or a nanocomposite capable of adjusting an absorption wavelength band and an emission wavelength band according to a concentration or a sort of substances.

The first, second, third and fourth wavelength converting materials may have an absorption wavelength band of about 350 nm to about 650 nm and an emission wavelength band of about 450 nm to about 750 nm. An absorption ratio by wavelength and an emission ratio by wavelength of the first, second, third and fourth wavelength converting materials may be adjusted according to a composition ratio or a sort of substances.

For example, the first and third wavelength converting materials may absorb a blue colored light and may emit a red colored light, and the second and fourth wavelength converting materials may absorb a blue colored light and may emit a green colored light.

A second planarizing layer952is disposed on the first, second and third wavelength converting layers946,948and950and on the first planarizing layer940of the fourth subpixel SP4.

For example, the first and second planarizing layers940and952and the plurality of microlenses938may include an organic insulating material such as a photo acryl.

The first and second planarizing layers940and952may have the same refractive index, and the first and second planarizing layers940and952and the plurality of microlenses938may have the different refractive indexes.

For example, the first and second planarizing layers940and952may have a refractive index of about 1.45 to about 1.55, and the plurality of microlenses938may have a refractive index equal to or smaller than about 1.4.

Although each of the plurality of microlenses938exemplarily has a shape of a convex lens in the ninth aspect, each of the plurality of microlenses938may have a shape of a concave lens in another aspect.

Although the plurality of microlenses938are spaced apart from each other in the ninth aspect, at least two of the plurality of microlenses938may contact each other in another aspect.

A first electrode960, a light emitting layer962and a second electrode964are sequentially disposed in the first, second, third and fourth subpixels SP1, SP2, SP3and SP4on the second planarizing layer952. The first electrode960, the light emitting layer962and the second electrode964constitute a light emitting diode emitting a white colored light.

In the OLED display device910according to a ninth aspect of the present disclosure, a light blocked by a total reflection at an interface between the first planarizing layer940and the substrate920and at an interface between the color filter layers932,934and936and the substrate920is minimized due to the plurality of microlenses938. As a result, a light emitting efficiency is improved.

In addition, the white spectrum of the first subpixel SP1, the red spectrum of the second subpixel SP2and the green spectrum of the third subpixel SP3may be variously adjusted by changing a composition ratio or a sort of substances of the first, second, third and fourth wavelength converting materials. Accordingly, various white spectrums of a high color temperature and a high luminance may be obtained.

Further, since the white colored light of the light emitting layer962is converted into the red colored light and the green colored light using the second and third wavelength converting patterns948and950of the second and third subpixels SP2and SP3, thicknesses of the first and second color filter layers932and934of the second and third subpixel SP2and SP3is reduced. As a result, a light emitting efficiency is improved.

Moreover, since the red, green and blue colored lights are emitted through the first, second and third color filters932,934and936, respectively, of the second, third and fourth subpixels SP2, SP3and SP4, a color reproducibility is improved.

Consequently, in the OLED display device according to the present disclosure, since the white colored light of the light emitting layer is converted into the light having a different color using the wavelength converting layer, various white spectrums of a high color temperature and a high luminance may be obtained.

In addition, since the white colored light of the light emitting layer is converted into the light having a different color using the wavelength converting layer and the light having a specific color among the white colored light of the light emitting layer is transmitted through the color filter layer, various white spectrums are obtained and a color reproducibility is improved.

The present disclosure also relates to and is not limited to the following aspects.

In the present disclosure, an organic light emitting diode display device includes: a substrate having first, second, third and fourth subpixels; first, second and third color filter layers in the second, third and fourth subpixels, respectively, on the substrate; a first wavelength converting layer in the first subpixel on the substrate and second and third wavelength converting layers on the first and second color filter layers, respectively; and a light emitting diode in each of the first, second, third and fourth subpixels over the first, second and third wavelength converting.

In the present disclosure, the first wavelength converting layer includes a first wavelength converting pattern of a first wavelength converting material and a second wavelength converting pattern of a second wavelength converting material, and each of the second and third wavelength converting layers includes third and fourth wavelength converting materials.

In the present disclosure, each of the first, second, third and fourth wavelength converting materials includes one of a quantum dot and a nanocomposite.

In the present disclosure, each of the first, second, third and fourth wavelength converting materials has an absorption wavelength band of 350 nm to 650 nm and an emission wavelength band of 450 nm to 750 nm.

In the present disclosure, each of the first and second wavelength converting patterns has one of a shape of a plurality of bars, a shape of a net and a shape of a rectangle.

In the present disclosure, the first, second, third and fourth subpixels correspond to white, red, green and blue colors, respectively, the first, second and third color filter layers selectively transmit red, green and blue colored lights, respectively, the first and third wavelength converting materials absorb the blue colored light and emit the red colored light, and the second and fourth wavelength converting materials absorb the blue colored light and emit the green colored light.

In the present disclosure, the light emitting diode includes a first electrode, a light emitting layer and a second electrode, and the light emitting layer includes first, second and third emitting material layers emitting first blue, yellow-green and second blue colored lights, respectively.

In the present disclosure, the light emitting diode includes a first electrode, a light emitting layer and a second electrode, and the light emitting layer includes first, second, third and fourth emitting material layers emitting first blue, yellow-green, green and second blue colored lights, respectively.

In the present disclosure, the organic light emitting diode display device further includes a plurality of microlenses disposed between the substrate and the light emitting diode and having an uneven shape.

In the present disclosure, each of the plurality of microlenses has one of a shape of a convex lens and a shape of a concave lens.

In the present disclosure, the organic light emitting diode display device further includes a first planarizing layer between the first, second and third wavelength converting layers and the light emitting diode, and the plurality of microlenses are disposed on the first planarizing layer.

In the present disclosure, a refractive index of the first planarizing layer is a same as a refractive index of the plurality of microlenses.

In the present disclosure, a refractive index of the first planarizing layer is greater than a refractive index of the plurality of microlenses.

In the present disclosure, the organic light emitting diode display device further includes: a first planarizing layer between the first, second and third color filter layers and the first, second and third wavelength converting layers; and a second planarizing layer between the first, second and third wavelength converting layers and the light emitting diode, and the plurality of microlenses are disposed between the substrate and the first planarizing layer.

In the present disclosure, the plurality of microlenses are disposed between the first, second and third color filter layers and the first planarizing layer.

In the present disclosure, the plurality of microlenses are disposed between the substrate and the first, second and third color filter layers.