CN103928624A - OLED device and display device - Google Patents

OLED device and display device Download PDF

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Publication number
CN103928624A
CN103928624A CN201310740773.9A CN201310740773A CN103928624A CN 103928624 A CN103928624 A CN 103928624A CN 201310740773 A CN201310740773 A CN 201310740773A CN 103928624 A CN103928624 A CN 103928624A
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microcavity
oled device
blue
organic layer
thickness
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韩立静
罗丽媛
王永志
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Tianma Microelectronics Co Ltd
Shanghai Tianma AM OLED Co Ltd
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Tianma Microelectronics Co Ltd
Shanghai Tianma AM OLED Co Ltd
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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • H10K59/352—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels the areas of the RGB subpixels being different
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2101/00—Properties of the organic materials covered by group H10K85/00
    • H10K2101/40—Interrelation of parameters between multiple constituent active layers or sublayers, e.g. HOMO values in adjacent layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2102/00—Constructional details relating to the organic devices covered by this subclass
    • H10K2102/301—Details of OLEDs
    • H10K2102/302—Details of OLEDs of OLED structures

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

The invention discloses an OLED device and a display device. The OLED device and the display device aim to solve the problem that images displayed by the OLED device have color differences in the prior art. The OLED device comprises a blue microcavity, a red microcavity and a green microcavity, wherein the forward directivity of emitted light of the blue microcavity is larger than that of emitted light of the red microcavity and that of emitted light of the green microcavity. By means of the technical scheme, when an observation angle is increased, a blue spectrum with higher forward directivity can be obtained, so that compared with light intensity of a blue spectrum in displayed spectrums of an OLED device of the same type in the off-axis direction in the prior art, the light intensity of the blue spectrum in the displayed spectrums of the OLED device in the off-axis direction is lowered, and accordingly the color difference problem of images displayed on the OLED device is effectively reduced.

Description

A kind of OLED device and display unit
Technical field
The present invention relates to demonstration field, relate in particular to a kind of OLED device and display unit.
Background technology
Show and compare with liquid crystal, the plasma of current extensive use, OLED(Organic Light-Emitting Diode; Organic Light Emitting Diode) device because its self-luminous, rich color, fast response time, visual angle are wide, lightweight, thin thickness, little power consumption, can realize the advantages such as flexible demonstration and receive much concern.
Conventionally, OLED device can be divided into end transmitting OLED device (BEOLED) and top transmitting OLED device (TEOLED) two kinds.Wherein, TEOLED device is that opaque electrode is grown on glass or silicon substrate, regrowth luminescent layer, luminescent layer is applied to the voltage time from the transparent or semitransparent negative electrode ejaculation at top, TEOLED device has compared to end transmitting (BEOLED) device the advantage that aperture opening ratio is high, is therefore widely used.
But in the prior art, exist when viewing angle changes, the emergent light that OLED device presents is existence blue shift in various degree, thereby causes OLED device display effect to have aberration.
Summary of the invention
Inventor finds through research, is because light causes described aberration problem at direction of principal axis with from the assignment problem of luminous intensity on direction of principal axis.
Consult the micro-cavity structure schematic diagram that Figure 1 shows that OLED device in prior art, in this microcavity, using metal alloy (as MgAg) layer as negative electrode, using metal (as Ag) layer as reflector, using indium tin oxide (ITO) layer as anode.Above-mentioned negative electrode and anode, and the electron injecting layer between negative electrode and anode (EIL), electron transfer layer (ETL), luminescent layer (EL), hole transmission layer (HTL), hole injection layer (HIL) totally 5 layers of organic layer be micro-cavity structure.
Consult shown in Fig. 2, after luminescent layer emits beam, light can produce multiple reflections in microcavity, finally from exiting side, penetrates.When emergent light penetrates from microcavity, phase difference δ meets formula 1:
Formula 1: δ=2j (λ/2)=2ndcos θ
Wherein: j is integer;
λ is emergent light wavelength;
N represents the mean refractive index of microcavity medium;
D is the thickness of microcavity;
θ is angle of reflection.
Generally, for definite device architecture, the mean refractive index n of microcavity medium and the thickness d of microcavity are steady state value, and as can be seen here, along with the increase of angle of reflection θ, wavelength can reduce, and causes the emergent light of this microcavity to have blue-shifted phenomenon.
For example, in 4.3WVGA oled panel, when viewing angle is 0 °, while observing from the dead ahead of oled panel, the peak value of red spectrum is that 612nm(is that wavelength corresponding to red spectrum is 612nm), the peak value of green spectral is that 511nm(is that wavelength corresponding to green spectral is 511nm), the peak value of blue color spectrum is that 478nm(is that wavelength corresponding to blue color spectrum is 478nm); When viewing angle is 70 °, from the dead ahead of oled panel, depart from 70 ° while observing, the peak value of red spectrum is that 603nm(is that wavelength corresponding to red spectrum is 603nm), while being 0 ° with respect to viewing angle, the colour cast of red spectrum is 0.113, in the chromaticity coordinates system of 1976Lu'v', the distance △ u'v' that is the red scale point of 70 ° and the viewing angle red scale point that is 0 ° when viewing angle is 0.113.The peak value of green spectral is that 506nm(is that wavelength corresponding to green spectral is 506nm), while being 0 ° with respect to viewing angle, the colour cast of green spectral is 0.045, the peak value of blue color spectrum is that 453nm(is that wavelength corresponding to blue color spectrum is 453nm), while being 0 ° with respect to viewing angle, the colour cast of blue color spectrum is 0.153.
Consult Fig. 3 and Fig. 4 and table 1, Fig. 3 be emergent light at direction of principal axis with from axial schematic diagram, 1976 chromaticity coordinatess systems in the prior art shown in Fig. 4, and the viewing angle θ shown in table 1 and colour cast relation table,
In the figure shown in Fig. 4, described direction of principal axis refers to the direction vertical with the exiting side of light, and in Fig. 4, Y-axis is direction of principal axis, departing from y direction of principal axis is from direction of principal axis, as can be seen here, the direction of emergent light 1 and Y-axis is consistent, and the direction of emergent light 1 is direction of principal axis.Emergent light 2 and Y-axis possess angle α 1, and emergent light 3 and Y-axis possess angle α 2, so the direction of emergent light 2, emergent light 3 is from direction of principal axis.Wherein, outgoing direction of light more approaches direction of principal axis, and its forward directive property is stronger, and the forward directive property of this emergent light is the ratio that positive direction (being direction of principal axis) goes out the total luminous intensity of luminous intensity and this emergent light, and this ratio is larger, and the forward directive property of emergent light is stronger.
Consult 1976 chromaticity coordinates systems in the prior art shown in Fig. 4, and the viewing angle θ shown in table 1 and colour cast relation table, in OLED device in the prior art, when viewing angle θ is converted into 70 ° successively by 0 °, namely viewing angle from direction of principal axis when changing from direction of principal axis, along with the increase of viewing angle θ, will there is blue-shifted phenomenon in the emergent light that OLED presents.For example, consult shown in table 1, the colour cast of white light is 0.174, this white light is comprised of according to certain ratio proportioning red, green and blue three kinds of colors, when viewing angle θ=0 °, because blue-shifted phenomenon does not all occur for red, green and blueness, the white light therefore obtaining is white; When 0 ° of viewing angle θ >, due to red, the green and blue blue shift in various degree that occurs respectively, cause the white light being generated by above-mentioned three kinds of colors that blue-shifted phenomenon also occurs, the white light that OLED presents is partially blue.
Table 1
Point θ(°) u' v' Colour cast
Point 1 0 0.20224 0.48795 0
Point 2 10 0.20418 0.48375 0.004626
Point 3 20 0.20835 0.46911 0.019806
Point 4 30 0.20952 0.44428 0.044273
Point 5 40 0.20387 0.40799 0.079977
Point 6 50 0.19643 0.36927 0.118822
Point 7 60 0.19210 0.34160 0.146701
Point 8 70 0.18414 0.31484 0.174054
In table 1, u ' and v ' the transverse and longitudinal coordinate parameter in being respectively in 1976 color charts; Colour cast can pass through u ' and v ' calculates acquisition, specifically can consult following formula:
Wherein, for viewing angle is θ xtime u ' value, this θ xfor non-zero °; u ' value while being 0 ° for viewing angle θ; for viewing angle is θ xtime v ' value, this θ xfor non-zero °; v ' value while being 0 ° for viewing angle θ.
Based on above problem, the embodiment of the present invention provides a kind of OLED device and display unit, has the problem of aberration in order to solve image that in prior art, OLED device presents.OLED device and display unit that the embodiment of the present invention provides comprise: blue microcavity, red microcavity, and green microcavity, wherein, the forward directive property of the emergent light of described blue microcavity is greater than the forward directive property of the emergent light of described red microcavity and described green microcavity.
Adopt technique scheme of the present invention, when viewing angle increases, can access the blue color spectrum that forward directive property is stronger, the light intensity that makes blue color spectrum in OLED device on direction of principal axis presents spectrum with respect to prior art in same model OLED device on direction of principal axis present spectrum in the light intensity of blue color spectrum decrease, and then effectively weakened the aberration problem that OLED presents image.
Accompanying drawing explanation
Fig. 1 is micro-cavity structure schematic diagram in prior art;
Fig. 2 be in prior art in microcavity light propagation model figure;
Fig. 3 is direction of principal axis schematic diagram;
Fig. 4 is the distribution schematic diagram of each point when viewing angle is different in 1976 chromaticity coordinates systems;
Fig. 5 is OLED device architecture schematic diagram in the embodiment of the present invention;
Fig. 6 a is when in the embodiment of the present invention, viewing angle is 0 °, the white light schematic diagram that OLED device presents;
Fig. 6 b is when in the embodiment of the present invention, viewing angle is greater than 0 °, the white light schematic diagram that OLED device presents;
Fig. 7 is OLED device luminous intensity distribution plot;
The strong ratio schematic diagram of the blue tiny cavity light-emitting of OLED device in the OLED device of Fig. 8 prior art and the embodiment of the present invention.
Embodiment
In order to solve image that in prior art, OLED device presents, there is the problem of aberration.In the embodiment of the present invention, OLED device comprises blue microcavity, red microcavity, and green microcavity, and wherein, the forward directive property of the emergent light of blue microcavity is greater than the forward directive property of the emergent light of red microcavity and green microcavity.Adopt technique scheme, when viewing angle increases, can access the blue color spectrum that forward directive property is stronger, the light intensity that makes blue color spectrum in OLED device on direction of principal axis presents spectrum with respect to prior art in same model OLED device on direction of principal axis present spectrum in the light intensity of blue color spectrum decrease, and then effectively weakened the aberration problem that OLED presents image.
Below in conjunction with accompanying drawing, the preferred embodiment of the present invention is elaborated.
Fig. 5 is OLED device architecture schematic diagram in the embodiment of the present invention, please refer to Fig. 5, the invention provides a kind of OLED device and comprise blue microcavity B, red microcavity R and green microcavity G, wherein, blue microcavity B is for presenting the emergent light of blue color spectrum, and red microcavity R is for presenting the emergent light of red spectrum, and green microcavity G is for presenting the emergent light of green spectral, the emergent light of above-mentioned three microcavitys acts on mutually, makes OLED device present versicolor image.In an embodiment of the present invention, the forward directive property of the emergent light of described blue microcavity B is greater than the forward directive property of the emergent light of described red microcavity B and described green microcavity G, wherein, described forward directive property is the ratio of the total luminous intensity of direction of principal axis outgoing light intensity and emergent light, the forward directive property of emergent light is stronger, simultaneously more weak from axial outgoing light intensity.
Then please refer to Fig. 6 a and Fig. 6 b, Fig. 6 a is when in the embodiment of the present invention, viewing angle is 0 °, the white light schematic diagram that OLED device presents, and Fig. 6 b is when in the embodiment of the present invention, viewing angle is greater than 0 °, the white light schematic diagram that OLED device presents.OLED device architecture provided by the invention, when viewing angle is 0 °, the luminous intensity r1 of luminous intensity b1, red microcavity R of blue microcavity B and the luminous intensity g1 of green microcavity G have formed white light W1 and have shown, because viewing angle is 0 °, so the light that blue microcavity B, red microcavity R and green microcavity G send does not all have partially blue, so white light W1 does not have partially blue yet.When viewing angle is greater than 0 °, the luminous intensity r2 of the luminous intensity b2 of blue microcavity B, red microcavity R and the luminous intensity g2 of green microcavity G have formed white light W2 and have shown.Because the forward directive property of the emergent light of blue microcavity B is greater than the forward directive property of the emergent light of described red microcavity B and described green microcavity G, therefore on direction of principal axis, the luminous intensity b2 of described blue microcavity B is less than the luminous intensity g2 of green microcavity G, also the luminous intensity r2 that is less than red microcavity R, namely blue light has died down.Although when viewing angle is greater than 0 °, still can there is partially blue phenomenon in red microcavity R and blue microcavity B, but because the luminous intensity b2 of blue microcavity B dies down, therefore the white light W2 demonstration forming has obtained correction, indigo plant or partially blue degree are little partially to make it, and the white light of having eliminated when viewing angle is greater than 0 ° in prior art shows partially blue technical problem.
Particularly, refer to Fig. 7, Fig. 7 is OLED device luminous intensity distribution schematic diagram, when an OLED device direction of principal axis outgoing light wavelength is equal to or less than the intrinsic spectral wavelength of organic layer of this OLED device, the forward directive property of above-mentioned OLED device emergent light is the strongest, the luminous intensity that is direction of principal axis (0 ° of direction) emergent light is maximum, and the light intensity distributions of its emergent light is consulted curve 1 in Fig. 7.When the difference of the intrinsic spectral wavelength of the organic layer of described OLED device direction of principal axis outgoing light wavelength and this OLED device is in 20 nanometer to 40 nanometer range, the light intensity distributions of above-mentioned OLED device emergent light meets lambertian distribution, the cosine value that is axial luminous intensity from axial luminous intensity, the light intensity distributions of its emergent light is consulted curve 2 in Fig. 7.When the difference of the intrinsic spectral wavelength of the organic layer of described OLED device direction of principal axis outgoing light wavelength and this OLED device is greater than 40 nanometer, the light intensity distributions of above-mentioned OLED device emergent light is by substantial deviation lambertian distribution, thereby from direction of principal axis, have higher luminous intensity, the light intensity distributions of its emergent light is consulted curve 3 in Fig. 7.
As can be seen here, when the difference of the intrinsic spectral wavelength in the organic layer of setting OLED device direction of principal axis emergent light wavelength and OLED device is less than or equal to 0, the strongest emergent light of forward directive property will be obtained, employing meets the OLED device of above-mentioned condition, can present the image of the less blue-shifted phenomenon of existence.When the difference of the intrinsic spectral wavelength in the organic layer of OLED device direction of principal axis emergent light wavelength and OLED device is greater than 20 nanometers and is less than 40 nanometer, acquisition is approached to the emergent light of lambertian distribution.Wherein, above-mentioned lambertian distribution is the luminous intensity and the positively related distribution of observation cosine of an angle of emergent light.
Therefore, optional, in embodiments of the present invention, can improve by improving the direction of principal axis emergent light wavelength of OLED device the blue-shifted phenomenon of OLED image that device presents.Be specially, consult following formula 1:
M λ m/ 2=L formula 1
Wherein, λ mdirection of principal axis emergent light wavelength for OLED device;
L is that the chamber of OLED device microcavity is long, and this chamber is long is optical cavity length;
M is positive integer.
From above-mentioned formula 1, if desired change OLED device direction of principal axis emergent light wavelength, optional, the spectral characteristic of the emergent light presenting according to different colours microcavity is different, the chamber progress row of above-mentioned three microcavitys is adjusted, improved the forward directive property of the emergent light of blue microcavity.
Further, consult following formula:
L = λ 2 ( n eff Δn ) + Σ i n i d i cos θ i + | φ m λ 4 π | Formula 2
Wherein, L is that the chamber of OLED device microcavity is long, and this chamber is long is optical cavity length;
λ is free space wavelength;
N efffor DBR effective refractive index;
N i, d ibe respectively refractive index and thickness in resonant cavity;
φ mphase shift for metallic mirror.
Because above-mentioned formula 2 is known, the chamber length of microcavity and the resonant cavity thickness positive correlation of microcavity, and therefore the organic layer thickness positive correlation of the resonant cavity thickness of microcavity and microcavity, can strengthen by adjusting the mode of microcavity organic layer thickness the emergent light forward directive property of blue microcavity.Even the organic layer thickness of blue microcavity reduces on existing structure basis.In the present invention, the organic layer thickness that described red microcavity is set is greater than the organic layer thickness of described green microcavity, and the organic layer thickness of described green microcavity is greater than the organic layer thickness of green microcavity.
For example, in an embodiment of the present invention, the organic layer thickness H3 of red microcavity R is 270 nanometers, the organic layer thickness H2 of green microcavity G is 215 nanometers, the thickness H1 of the organic layer of blue microcavity B is less than 180 nanometers, and be greater than or equal to 176 nanometers, preferably, the organic layer thickness H1 of above-mentioned blue microcavity B is 176 nanometers.Consult shown in Fig. 6 b, after reducing the organic layer thickness H1 of the blue microcavity B of OLED device, when 0 ° of viewing angle θ >, the white light blue-shifted phenomenon that OLED device presents weakens.
As can be seen here, adopt technical solution of the present invention, when the forward directive property of the emergent light of blue microcavity B increases, to weaken in the light intensity on direction of principal axis of the emergent light of this blueness microcavity B, thereby make when viewing angle increases, in the spectrum that OLED device presents, red spectrum and green spectral proportion are stronger, and blue color spectrum proportion is less, effectively having improved when viewing angle is larger, there is the problem of aberration in OLED image that device presents.
Optionally, the OLED device that reduces to obtain after the organic layer thickness of blue microcavity can be following form: in above-mentioned OLED device, in blue microcavity B, the thickness of hole transmission layer is the first preset value, wherein, in above-mentioned the first preset value and blue microcavity B, except above-mentioned hole transmission layer, the gross thickness sum of every other organic layer is greater than or equal to 176 nanometers, and is less than 180 nanometers.Because hole transmission layer is less on the impact of carrier transport, therefore, adopt the above-mentioned thickness that improves hole transmission layer to improve the organic layer thickness H1 of blue microcavity B, can not affect the transmission of charge carrier in OLED device.Or, in above-mentioned OLED device, in all organic layers in blue microcavity B except hole transmission layer, having the thickness of at least one organic layer and the thickness sum of above-mentioned hole transmission layer is the second preset value, wherein, in above-mentioned the second preset value and blue microcavity, except above-mentioned hole transmission layer and at least one organic layer, the gross thickness sum of every other organic layer is greater than or equal to 176 nanometers, and is less than 180 nanometers.For example, reduce the thickness of hole transmission layer and the thickness that reduces hole injection layer, making the thickness of hole transmission layer and the thickness sum of hole injection layer is the second preset value, and the thickness of electron injecting layer in this second preset value and above-mentioned blue microcavity is, the thickness summation of the thickness of electron transfer layer luminescent layer and indium tin oxide layer is more than or equal to 176 nanometers, and be less than 180 nanometers.
Optionally, the OLED device that reduces to obtain after the organic layer thickness H1 of blue microcavity B can also be following form: in above-mentioned OLED device, in every other organic layer in blue microcavity B except hole transmission layer, the thickness that only has any organic layer is the 3rd preset value, wherein, above-mentioned the 3rd preset value is greater than or equal to 176 nanometers with the gross thickness sum of every other organic layer except above-mentioned any organic layer, and is less than 180 nanometers.For example, in blue microcavity B, the thickness of hole injection layer is the 3rd preset value.Or, in above-mentioned OLED device, in every other organic layer in blue microcavity B except hole transmission layer, having the thickness sum of at least two organic layers is the 4th preset value, wherein, the 4th preset value is greater than or equal to 176 nanometers with the gross thickness sum of every other organic layer except above-mentioned at least two organic layers, and is less than 180 nanometers.For example, reduce the thickness of indium tin oxide layer and the thickness that reduces hole injection layer, making the thickness of indium tin oxide layer and the thickness sum of hole injection layer is the 4th preset value, and the thickness of hole transmission layer in the 4th preset value and above-mentioned blue microcavity is, the thickness summation of the thickness of electron injecting layer and electron transfer layer luminescent layer is more than or equal to 176 nanometers, and be less than 180 nanometers.
In the embodiment of the present invention, according to the difference of OLED device model, and the difference of microcavity material in OLED device, the organic layer thickness of above-mentioned three kinds of color microcavitys is different, but regardless of OLED model and microcavity material, the organic layer thickness H3 that all meets red microcavity R is greater than the organic layer thickness H2 of green microcavity G, and the organic layer thickness H2 of green microcavity G is greater than blue microcavity B organic layer thickness H1; And the organic layer thickness H1 of blue microcavity B is less than the organic layer thickness of blue microcavity in the OLED device of same model in prior art and microcavity material in OLED device of the present invention.
Please refer to Fig. 8 and table 2, the strong ratio schematic diagram of the blue tiny cavity light-emitting of OLED device in the OLED device of Fig. 8 prior art and the embodiment of the present invention, in the OLED device that table 2 is prior art and the embodiment of the present invention, the hue error value of OLED device under different viewing angles compares the table of comparisons.Below in conjunction with concrete test result, describe the display effect of the OLED device of embodiment of the present invention proposition in detail.
In prior art, in an OLED device, the organic layer thickness of red microcavity is 270 nanometers, and the organic layer thickness of green microcavity is 215 nanometers, and the organic layer thickness of blue microcavity is 180 nanometers, and the peak position of its blue color spectrum is 445 nanometers.
In the OLED device proposing in the embodiment of the present invention, the organic layer thickness H1 of red microcavity R is 270 nanometers, the organic layer thickness H2 of green microcavity G is 215 nanometers, the organic layer thickness H1 of blue microcavity B is 176 nanometers, and the OLED device than prior art, be by adjusting the thickness of hole transport layer of blue microcavity B, be about to thickness of hole transport layer and be set to 39 nanometers.Now, than prior art, in the OLED device that the embodiment of the present invention proposes, the peak position of blue color spectrum is adjusted to 440 nanometers.Consult shown in Fig. 8.Because the blue color spectrum of 440 nanometers has stronger forward directive property compared to the blue color spectrum of 445 nanometers, therefore, when viewing angle is larger, the OLED device after above-mentioned fine setting to 39 nanometer will obtain better image.Consulting table 2 is depicted as, peak position is that 445 nanometer blue color spectrum and peak position are the colour cast (△ u'v') of 440 nanometer blue color spectrum white light under different angles, particularly, in viewing angle, it is 20 °, OLED device colour cast △ u'v' of the prior art is 0.0147, and the colour cast △ u'v of OLED device of the present invention is only 0.0070; In viewing angle, be 40 °, OLED device colour cast △ u'v' of the prior art is 0.1049, and the colour cast △ u'v of OLED device of the present invention is only 0.0451.As shown in Table 2, after the organic layer thickness of OLED device is finely tuned, the blue-shifted phenomenon of white light will effectively be improved.
Table 2
Based on above-mentioned color membrane substrates, the present invention also provides a kind of display unit, and this display unit comprises above-mentioned OLED device.
In sum, in the embodiment of the present invention, provide a kind of organic light emitting diode device, comprise blue microcavity, red microcavity, and green microcavity, wherein, the forward directive property of the emergent light of this blueness microcavity is greater than the forward directive property of the emergent light of red microcavity and green microcavity.Adopt technique scheme, when viewing angle increases, can access the blue color spectrum that forward directive property is stronger, the light intensity that makes blue color spectrum in OLED device on direction of principal axis presents spectrum with respect to prior art in same model OLED device on direction of principal axis present spectrum in the light intensity of blue color spectrum decrease, and then effectively weakened the aberration problem that OLED presents image.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the embodiment of the present invention the embodiment of the present invention.Like this, if within these of the embodiment of the present invention are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.

Claims (7)

1. an Organic Light Emitting Diode OLED device, comprises blue microcavity, red microcavity, and green microcavity, and wherein, the forward directive property of the emergent light of described blue microcavity is greater than the forward directive property of the emergent light of described red microcavity and described green microcavity.
2. OLED device as claimed in claim 1, is characterized in that, the organic layer thickness of described red microcavity is greater than the organic layer thickness of described green microcavity, and the organic layer thickness of described green microcavity is greater than the organic layer thickness of green microcavity.
3. OLED device as claimed in claim 2, is characterized in that, the forward directive property of the emergent light of described red microcavity equals the forward directive property of the emergent light of described green microcavity.
4. OLED device as claimed in claim 2, it is characterized in that, when the organic layer thickness of described red microcavity is 270 nanometers, when the organic layer thickness of described green microcavity is 215 nanometer, the organic layer thickness of described blue microcavity is greater than or equal to 176 nanometers, and is less than 180 nanometers.
5. the OLED device as described in claim 1-4 any one, is characterized in that, in described blue microcavity, the thickness of hole transmission layer is the first preset value;
Or in all organic layers in described blue microcavity except described hole transmission layer, having the thickness of at least one organic layer and the thickness sum of described hole transmission layer is the second preset value; Wherein, in described the first preset value and described blue microcavity, except described hole transmission layer, the gross thickness sum of every other organic layer is greater than or equal to 176 nanometers, and is less than 180 nanometers; In described the second preset value and described blue microcavity, except described hole transmission layer and described at least one organic layer, the gross thickness sum of every other organic layer is greater than or equal to 176 nanometers, and is less than 180 nanometers.
6. the OLED device as described in claim 1-4 any one, is characterized in that, in the every other organic layer in described blue microcavity except hole transmission layer, the thickness that only has any organic layer is the 3rd preset value;
Or in the every other organic layer in described blue microcavity except hole transmission layer, having the thickness sum of at least two organic layers is the 4th preset value; Wherein, described the 3rd preset value is greater than or equal to 176 nanometers with the gross thickness sum of every other organic layer except described any organic layer, and is less than 180 nanometers; Described the 4th preset value is greater than or equal to 176 nanometers with the gross thickness sum of every other organic layer except described at least two organic layers, and is less than 180 nanometers.
7. a display unit, is characterized in that, comprises the OLED device as described in claim 1-6 any one.
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CN113410412A (en) * 2021-06-17 2021-09-17 安徽熙泰智能科技有限公司 High-performance color silicon-based OLED and preparation method thereof

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Application publication date: 20140716