CN108448007A - Organic light emitting display panel and its display device - Google Patents
Organic light emitting display panel and its display device Download PDFInfo
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- CN108448007A CN108448007A CN201810294871.7A CN201810294871A CN108448007A CN 108448007 A CN108448007 A CN 108448007A CN 201810294871 A CN201810294871 A CN 201810294871A CN 108448007 A CN108448007 A CN 108448007A
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- 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
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/852—Arrangements for extracting light from the devices comprising a resonant cavity structure, e.g. Bragg reflector pair
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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
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Abstract
A kind of organic light emitting display panel of offer of the embodiment of the present invention and its display device, are related to display technology field, for improving big visual angle color offset phenomenon.Wherein, which includes：In multiple sub-pixel units of array distribution, each sub-pixel unit includes at least first area and second area；There is the first micro-cavity structure, the second area to have the second micro-cavity structure for the first area, wherein the wavelength of the maximum glow peak of the first micro-cavity structure emergent light is more than the wavelength of the maximum glow peak of the second micro-cavity structure emergent light.The organic light emitting display panel is suitable for display device.
Description
Technical field
The present invention relates to display technology field more particularly to a kind of organic light emitting display panels and its display device.
Background technology
Receive in the sense organ of people information it is most be exactly the organs of vision (eyes), in production and life, Ren Menxu
It is increasingly utilized abundant visual information, thus display technology plays very important angle in mankind nowadays society
Color.So far from appearance, technology development is also very swift and violent for display technology, as the development and the mankind of society are to material life demand
It is continuously improved, current display technology is high, long towards high contrast, high resolution, full-color EL display, low-power consumption, reliability
Service life and thin and light direction quickly stride forward.
Wherein, Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED) display device is due to tool
Have the advantages that wide self-luminous, fast response time, visual angle, high-resolution, high brightness, bending resistance be strong, low-power consumption, is increasingly becoming liquid
The strong rival of LCD panel is known as next-generation dreamlike display technology.
There are more serious colour cast under big visual angle, which is generally existing and urgently to be resolved hurrily in OLED display device.
Invention content
In view of this, a kind of organic light emitting display panel of present invention offer and its display device, for improving under big visual angle
Colour cast.
In a first aspect, the present invention provides a kind of organic light emitting display panel, which includes：In array
Multiple sub-pixel units of distribution, each sub-pixel unit include at least first area and second area；
There is the first micro-cavity structure, the second area to have the second micro-cavity structure for the first area, wherein described the
The wavelength of the maximum glow peak of one micro-cavity structure emergent light is more than the wave of the maximum glow peak of the second micro-cavity structure emergent light
It is long.
Second aspect, the present invention provide a kind of display device, which includes that aforementioned present invention first aspect is related to
The organic light emitting display panel arrived.
Any technical solution in above-mentioned technical proposal has the advantages that：
In the present embodiment, the wavelength of the maximum glow peak for the light that the first micro-cavity structure in first area projects is adjusted
It is whole, the wavelength of the maximum glow peak for the light that the second micro-cavity structure being larger than in second area projects, that is, in sub-pixel unit
First area in the intrinsic peak for going out light color wavelength be more than the sub-pixel unit in second area in go out light color
Intrinsic peak wavelength.Be inversely proportional with visual angle due to the resonance wavelength of the light projected from micro-cavity structure again, work as light from
After being projected under big visual angle, although visual angle angle increases, also increase therewith due to going out the wavelength at intrinsic peak of light color, it is right
The resonance wavelength of the light projected under big visual angle or angle of squint is compensated, so that the resonance wavelength under big visual angle is leaned on
Nearly positive visual angle either the resonance wavelength under small angle and then improves the visual angle color offset phenomenon under big visual angle or angle of squint.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Some bright embodiments for those of ordinary skill in the art without having to pay creative labor, can be with
Obtain other attached drawings according to these attached drawings.
A kind of structural schematic diagram for the organic light emitting display panel that Fig. 1 is provided by the embodiment of the present invention；
Another structural schematic diagram for the organic light emitting display panel that Fig. 2 is provided by the embodiment of the present invention；
Another structural schematic diagram for the organic light emitting display panel that Fig. 3 is provided by the embodiment of the present invention；
Another structural schematic diagram for the organic light emitting display panel that Fig. 4 is provided by the embodiment of the present invention；
Another structural schematic diagram for the organic light emitting display panel that Fig. 5 is provided by the embodiment of the present invention；
Another structural schematic diagram for the organic light emitting display panel that Fig. 6 is provided by the embodiment of the present invention；
Another structural schematic diagram for the organic light emitting display panel that Fig. 7 is provided by the embodiment of the present invention；
Another structural schematic diagram for the organic light emitting display panel that Fig. 8 is provided by the embodiment of the present invention；
Another structural schematic diagram for the organic light emitting display panel that Fig. 9 is provided by the embodiment of the present invention；
Another structural schematic diagram for the organic light emitting display panel that Figure 10 is provided by the embodiment of the present invention；
The structural schematic diagram for the display device that Figure 11 is provided by the embodiment of the present invention.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
The term used in embodiments of the present invention is the purpose only merely for description specific embodiment, is not intended to be limiting
The present invention.In the embodiment of the present invention and "an" of singulative used in the attached claims, " described " and "the"
It is also intended to including most forms, unless context clearly shows that other meanings.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation of description affiliated partner, indicate
There may be three kinds of relationships, for example, A and/or B, can indicate：Individualism A, exists simultaneously A and B, individualism B these three
Situation.In addition, character "/" herein, it is a kind of relationship of "or" to typically represent forward-backward correlation object.
It will be appreciated that though in embodiments of the present invention region, but these may be described using term first, second etc.
Region should not necessarily be limited by these terms.These terms are only used for region being distinguished from each other out.For example, not departing from the embodiment of the present invention
In the case of range, first area can also be referred to as second area, and similarly, second area can also be referred to as the firstth area
Domain.
It should be noted that the nouns of locality such as "upper", "lower", "left", "right" described in the embodiment of the present invention are with attached drawing
Shown in angle come what is be described, should not be construed as the restriction to the embodiment of the present invention.In addition within a context, it is also necessary to manage
Solution can not only be formed directly into another when mentioning an element and being formed on "above" or "below" another element
Either "lower" can also be indirectly formed by intermediary element in another element "upper" or "lower" for a element "upper".
It is detailed introduce the present embodiment before, be simply situated between to the structure for the organic light emitting display panel being related to
It continues：
As shown in Figure 1, a kind of structural schematic diagram for the organic light emitting display panel that its embodiment of the present invention is provided, organic
Light emitting display panel 1 includes first substrate 10, multiple organic luminescent devices 11 on 10 1 side surface of first substrate is arranged, often
A organic luminescent device 11 includes first electrode 12, second electrode 14 and is arranged between first electrode 12 and second electrode 14
Organic function layer 13, the first electrode 12 are in contact with a side surface of first substrate 10, and second electrode 14 is located at organic functions
Layer 13 deviates from a side surface of first substrate 10.It should be noted that first electrode 12 and second electrode 14 are public film layer,
Therefore the first electrode 12 in Fig. 1 and second electrode 14 are a whole film layer.
It is understood that the first substrate 10 in the present embodiment can be flexible base board, corresponding organic light emitting display face
Plate 1 can be flexible organic light emitting display panel, and flexible organic light emitting display panel has low-power consumption and the special efficacys such as flexible, is applicable in
In various display equipment, it is particularly suitable in wearable display equipment.Optionally, the material of flexible base board is polyester-imide or gathers
Terephthalate fat resin.In addition, first substrate 10 can also be rigid substrates, corresponding organic light emitting display panel 1
For rigid organic light emitting display panel.In fact, the present embodiment is not particularly limited to the material of organic light emitting display panel.
In the present embodiment, first electrode 12 can be regarded as anode, to anode (first electrode 12) during electroluminescent
Apply positive voltage.The material of first electrode 12 in the present embodiment can be tin indium oxide.Specifically, first electrode 12 includes at least
Reflective membrane, reflective membrane can be located at first electrode 12 on a side surface of first substrate 10, and the material of reflective membrane can
For silver.First electrode 12 may also include transparent conductive film, be located at the side surface that reflective membrane deviates from first substrate 10, transparent
The material of conductive film can be tin indium oxide or indium zinc oxide.
In the present embodiment, second electrode 14 can be regarded as cathode, can be to cathode (second electrode during electroluminescent
14) apply negative voltage.The material of second electrode 14 can be Ag, Al, Ca, In, Li, the low workfunction metals such as Mg material or low work(
Fonction composition metal material.The material of second electrode 14 in this example can be U.S. silver alloy, silver alloy, silver-colored ytterbium alloy or silver
One kind in rare earth alloys.
It is understood that there is the organic light emitting display panel 1 m kinds to go out light color, m is whole more than or equal to 3
Number, illustrative the present embodiment may include that three kinds go out light color, respectively red, green and blue, each organic illuminator
Part 11 corresponds to one kind and going out light color.
With continued reference to Fig. 1, the organic light emitting display panel 1 in this example can be regarded as top emitting organic light emitting display face
Plate, that is to say, that first electrode 12 can be regarded as total reflection anode, and second electrode 14 can be regarded as semitransparent cathode, wherein complete
Reflection anode (first electrode 12) constitutes microcavity (resonant cavity) with semitransparent cathode (second electrode 14), when the chamber of micro-cavity structure is long
When meeting certain relationship with optical wavelength, the light of specific wavelength (a certain monochromatic wavelength) can be strengthened, spectrum narrowing, hair
Raw microcavity effect.Microcavity effect has the effects that selection to light source, narrows and reinforce, and is often used to improve organic luminescent device
Coloration, the emissive porwer for reinforcing specific wavelength and the luminescent color etc. for changing organic luminescent device.
In the prior art, microcavity effect includes wide-angle interference and two kinds of interference patterns of multiple-beam interference, wherein due to wide-angle
The presence of interference can influence the viewing angle characteristic of organic luminescent device, i.e., with the offset at visual angle, glow peak shifts, and leads to brightness
Difference and color-coordinate shift, especially under big visual angle, optical property is bad, and colour cast is more serious.
It is assumed that angle when by eyes and screen vertical is referred to as positive visual angle, this angle can be set to 0 °, in this angle
The microcavity effect of the light of lower injection is most apparent, i.e., the light color projected under the visual angle is full, does not occur colour cast or appearance
Colour cast do not discovered by human eye.On the basis of screen direction, eyes can be referred to as to squint to the left or when right bank
Angle refers to an angle value more than 0 ° and less than 90 °, and the angle value is absolute figure, for example, eyes are tilted to the right
45 °, angle of squint at this time is 45 °, and eyes are tilted to the left 45 °, and angle of squint at this time is also 45 °.And the angle of angle of squint increases
Big visual angle is can be regarded as to a certain extent greatly, under big visual angle, glow peak shifts, and leads to colour cast.
To solve the above-mentioned problems, inventor devises following skill scheme：
The present embodiment provides a kind of organic light emitting display panels, are institute of the embodiment of the present invention as shown in Figures 2 and 3
Another structural schematic diagram of the organic light emitting display panel of offer, the organic light emitting display panel 1 include：In array distribution
Multiple sub-pixel units 2, it is to be understood that each sub-pixel unit 2 includes an organic luminescent device 11.
Also, with continued reference to Fig. 3, each sub-pixel unit 2 includes at least first area 21 and second area 22.Wherein,
There is the first micro-cavity structure 210, second area 22 to have the second micro-cavity structure 220 for first area 21, wherein the first micro-cavity structure
The wavelength of the maximum glow peak of 210 emergent lights is more than the wavelength of the maximum glow peak of 220 emergent light of the second micro-cavity structure.It can manage
Solution, the wavelength of the maximum glow peak of emergent light are the peak position for going out the intrinsic peak corresponding to light color of the sub-pixel unit 2,
Namely this goes out the wavelength corresponding to the intrinsic peak of light color.
By going out for light color is red for sub-pixel unit 2, the light extraction principle of the present embodiment is simply introduced：
There are following relational expressions with visual angle for resonance wavelength in micro-cavity structure：
The π mL*cos of λ=2 Ψ
Wherein, λ is resonance wavelength under different visual angles, and Ψ is visual angle angle, L be sub-pixel unit it is corresponding go out light color
The wavelength at assertive evidence peak, m are the series of emission mode.From the above relation it can be seen that when the wavelength L at the intrinsic peak for going out light color is certain
When, visual angle angle Ψ and resonance wavelength are inversely.
At this time, it is assumed that the wavelength at the assertive evidence peak corresponding to red is 610nm, and the face that the light that wavelength is 610nm is projected
Color is interpreted as positive red, if resonance wavelength is equal with the wavelength at intrinsic peak, shows that the light projected from micro-cavity structure is positive red.
But with the increase at visual angle, that is to say, that visual angle from 0 ° of positive visual angle to during the transformation of 90 ° of angle of squint,
Resonance wavelength is smaller and smaller, so that the color of the light projected from micro-cavity structure shifts, no longer it is positive red.This reality
It applies in example, the wavelength of the maximum glow peak for the light that the first micro-cavity structure 210 in first area 21 projects is adjusted, it is made
More than the wavelength of the maximum glow peak of the light of the second micro-cavity structure 220 injection in second area 22, that is, in sub-pixel unit 2
First area 21 in the intrinsic peak for going out light color wavelength be more than the sub-pixel unit 2 in second area 22 in light extraction
The wavelength at the intrinsic peak of color, illustratively, the wavelength at intrinsic peak can be 615nm in first area 21.Again due to from microcavity knot
The resonance wavelength for the light that structure projects is inversely proportional with visual angle, therefore, after light projects under big visual angle, although visual angle angle
Ψ increases, but the wavelength L at the intrinsic peak due to going out light color also increases therewith, so that the resonance wavelength under big visual angle is leaned on
Resonance wavelength under nearly positive visual angle or small angle so that the color of the light projected under big visual angle or angle of squint is close to just
It is red.
In the present embodiment, by increasing the wavelength at the intrinsic peak in the first micro-cavity structure 210, it is larger than the second microcavity
The wavelength at the intrinsic peak in structure 220, it is understood that, the present embodiment mends the resonance wavelength under big visual angle
It repays, the resonance wavelength being close under positive visual angle or small angle so that the light color that goes out under big visual angle or angle of squint approaches
Go out light color under positive visual angle, and then improves the visual angle color offset phenomenon under big visual angle or angle of squint.
Further, in the present embodiment first area 21 and second area 22 can there are many position relationships, it is exemplary, two
The position relationship of person can be as shown in figure 3, second area 22 be located at the central area of sub-pixel unit 2, and first area 21 is located at son
The neighboring area of pixel unit 2, orthographic projection of the first area 21 in organic light emitting display panel is with second area 22 organic
Orthographic projection no overlap on light emitting display panel.It is angular oblique facing on the basis of orientation illustrated in fig. 3 in the present embodiment
During visual angle change, no matter change to the left or to the right, the resonance wavelength under angle of squint can all be compensated, to change
The visual angle color offset phenomenon being apt under big visual angle or angle of squint.
In addition, the position relationship of first area and second area can also be as shown in figure 4, it be provided by the embodiment of the present invention
Another structural schematic diagram of organic light emitting display panel can only need to be to the big of left side or right side in specific device
Visual angle colour cast is improved, at this point, neighboring area is arranged in the periphery of central area, i.e., by 22 centrally disposed region of second area
It is interior, first area 21 is set in the neighboring area of central area.
In one embodiment, the wavelength of the maximum glow peak of the first micro-cavity structure emergent light goes out with the second micro-cavity structure
The difference for penetrating the wavelength of the maximum glow peak of light is X, wherein 0nm ＜ X≤5nm.After if X is more than 5nm, in the first micro-cavity structure
The color of the light of injection will and the second micro-cavity structure in the deviation of the difference of the color of light or color that projects it is larger, can be right
Display impacts, therefore in order to ensure that the color of the light emitted by the first micro-cavity structure and the second micro-cavity structure is identical or phase
Seemingly, the light that the wavelength (the intrinsic peak for going out light color) of the maximum glow peak of the light projected from the first microcavity is projected with the second microcavity
Wavelength (the intrinsic peak for going out light color) phase difference of maximum glow peak should be within 5nm.
In order to which those skilled in the art can be apparent from the present embodiment, below to the organic light emitting display of the present embodiment
The principle of luminosity of panel is simply introduced：
As shown in figure 5, another structural schematic diagram of its organic light emitting display panel provided by the embodiment of the present invention,
The organic function layer 13 included by organic luminescent device 11 in sub-pixel unit 2 includes electron transfer layer 131, hole transmission layer
133 and luminescent layer 132, wherein electron transfer layer 131 is arranged close to second electrode 14, and hole transmission layer 133 is close to the first electricity
Pole 12 is arranged, and luminescent layer 132 is between electron transfer layer 131 and hole transmission layer 133.
Under the action of extra electric field, electronics e is injected from second electrode 14 (cathode) to organic function layer 13, hole h from
First electrode 12 (anode) is injected to organic function layer 13.Injected electrons e from the electron transfer layer 131 of organic function layer 13 to
Luminescent layer 132 migrates, and injected holes h is migrated from the hole transmission layer 133 of organic function layer 13 to luminescent layer 132.Injection
Electronics e and injected holes h generates exciton after luminescent layer 132 is compound.Exciton migrates under the action of electric field, by energy transmission
To the luminescent organic molecule in luminescent layer 132, the electronics of luminescent organic molecule by ground state transition to excitation state and releases energy, most
Energy is discharged and is emitted beam by the form of photon afterwards.
In one embodiment, as shown in fig. 6,2 sub-pixel unit of sub-pixel unit in the present embodiment includes at least
First color sub-pixels unit 201, the second color sub-pixels unit 202 and third color sub-pixels unit 203.Illustratively,
First color sub-pixels unit 201, the second color sub-pixels unit 202 and third color sub-pixels unit 203 are respectively red son
One kind in pixel unit, blue subpixels unit and green sub-pixels unit.
In one embodiment, doping concentration or change of the present embodiment by the guest materials in change luminescent layer
The dopant material of guest materials in luminescent layer so that go out in first area the intrinsic peak of light color wavelength (maximum glow peak
Wavelength) it is more than the wavelength (wavelength of maximum glow peak) at the intrinsic peak for going out light color in second area：
The first situation, the guest materials hair corresponding with second area 22 in 21 corresponding luminescent layer 132 of first area
Guest materials in photosphere 132 is identical, wherein the doping concentration of the guest materials in 21 corresponding luminescent layer 132 of first area
Percentage is more than the doping concentration percentage of the guest materials in 22 corresponding luminescent layer 132 of second area.
After the doping concentration of the guest materials of the corresponding luminescent layer in first area is got higher so that luminescent layer in first area
The energy gap of guest materials become smaller, cause the spectral red shift of light color, i.e. glow peak to shift.Also, object material
Material has certain electron mobility, and after doping concentration is got higher, luminous position is deviated to hole side, may also lead to glow peak
Offset, and then it is elongated to go out the wavelength corresponding to light color, that is to say, that the wavelength for going out the corresponding intrinsic peak of light color increases
Greatly.In this way according to above-mentioned resonance wavelength and the relationship of the wavelength at the assertive evidence peak for going out light color it is found that going out the assertive evidence peak of light color
Wavelength increases, and the resonance wavelength under the visual angle increases.Again since first area setting is in neighboring area, second area is arranged in
Heart district domain increases resonance wavelength of the angle of squint either under big visual angle so that resonance under angle of squint or big visual angle
Resonance wavelength of the wavelength under positive visual angle so that go out light color close to the light extraction under positive visual angle under angle of squint or big visual angle
Color, therefore the color offset phenomenon under angle of squint or big visual angle can be improved.
Further, in a kind of specific embodiment, the first color sub-pixels unit 201 is red sub-pixel list
Member, in red sub-pixel unit, the doping concentration percentage of the guest materials in 21 corresponding luminescent layer 132 of first area with
The difference of the doping concentration percentage of guest materials in 22 corresponding luminescent layer 132 of second area is A, 2%≤A≤7%.
By the present embodiment combination the above embodiment it is found that the wavelength of the maximum glow peak of first area (goes out light color institute
The wavelength at corresponding intrinsic peak) wavelength (wavelength for going out the assertive evidence peak corresponding to light color) with the maximum glow peak of second area
Between difference need to be less than 5nm, just can guarantee what the color of the light projected from first area was projected with second area in this way
The color of light is same or similar, and then ensures that the sub-pixel unit projects the light of same color.At this point, for red son
For pixel unit, that is, need the doping concentration of the guest materials of the luminescent layer in control first area and shining for second area
Layer guest materials doping concentration difference A in a certain range, exemplary, 2%≤A≤7%.
Further, in another specific embodiment, the second color sub-pixels unit 202 is blue subpixels list
Member, in blue subpixels unit, the doping concentration percentage of the guest materials in 21 corresponding luminescent layer 132 of first area with
The difference of the doping concentration percentage of guest materials in 22 corresponding luminescent layer of second area is B, 6%≤B≤12%.
By the present embodiment combination the above embodiment it is found that the wavelength of the maximum glow peak of first area (goes out light color institute
The wavelength at corresponding intrinsic peak) wavelength (wavelength for going out the assertive evidence peak corresponding to light color) with the maximum glow peak of second area
Between difference need to be less than 5nm, just can guarantee what the color of the light projected from first area was projected with second area in this way
The color of light is same or similar, and then ensures that the sub-pixel unit projects the light of same color.At this point, for blue son
For pixel unit, that is, need the doping concentration of the guest materials of the luminescent layer in control first area and shining for second area
Layer guest materials doping concentration difference B in a certain range, exemplary, 6%≤B≤12%.
Further, in another specific embodiment, third color sub-pixels unit is green sub-pixels list
Member, in green sub-pixels unit, the doping concentration percentage and second of the guest materials in the corresponding luminescent layer in first area
The difference of the doping concentration percentage of guest materials in the corresponding luminescent layer in region is C, 1%≤C≤5%.
By the present embodiment combination the above embodiment it is found that the wavelength of the maximum glow peak of first area (goes out light color institute
The wavelength at corresponding intrinsic peak) wavelength (wavelength for going out the assertive evidence peak corresponding to light color) with the maximum glow peak of second area
Between difference need to be less than 5nm, just can guarantee what the color of the light projected from first area was projected with second area in this way
The color of light is same or similar, and then ensures that the sub-pixel unit projects the light of same color.At this point, for green son
For pixel unit, that is, need the doping concentration of the guest materials of the luminescent layer in control first area and shining for second area
Layer guest materials doping concentration difference C in a certain range, exemplary, 1%≤C≤5%.
The second situation, the guest materials hair corresponding with second area 22 in 21 corresponding luminescent layer 132 of first area
Guest materials in photosphere 132 is different, wherein the maximum of the guest materials in 21 corresponding luminescent layer 132 of first area shines
The wavelength at peak is more than the wavelength of the maximum glow peak of the guest materials in 22 corresponding luminescent layer 132 of second area.The present embodiment
Different guest materials is adulterated in the luminescent layer of first area and the luminescent layer of second area so that the maximum hair corresponding to the two
The wavelength of photopeak is different, and then improves the colour cast under big visual angle or angle of squint.Specifically, according to above-mentioned relation formula it is found that with
The increase of visual angle angle, resonance wavelength shortens, and the wavelength at intrinsic peak increases, and resonance wavelength increases, therefore, the present embodiment,
Change the wavelength (wave at intrinsic peak of the corresponding maximum glow peak of the guest materials of the luminescent layer 132 in first area 21
It is long), be larger than the maximum glow peak corresponding to the guest materials of the luminescent layer 132 in second area wavelength (intrinsic peak
Wavelength), the wavelength of the guest materials in the luminescent layer in first area (neighboring area) is increased, is also just increased namely tiltedly
Resonance wavelength under visual angle, so that when light is projected from first area (neighboring area), the resonance wavelength under angle of squint
Resonance wavelength close under positive visual angle, so as to improve the colour cast under angle of squint or big visual angle.
In one embodiment, it is different to grow chamber length corresponding from the second micro-cavity structure for the corresponding chamber of the first micro-cavity structure.
The chamber length of microcavity can be regarded as on the direction perpendicular to organic light emitting display panel, first electrode (anode) 12 to second electrode
The thickness of (cathode) 14.
Specifically, there are the following two kinds with the chamber length corresponding to the second micro-cavity structure for the chamber length corresponding to the first micro-cavity structure
Relationship：
The first, it is long that the corresponding chamber length of the first micro-cavity structure is more than the corresponding chamber of the second micro-cavity structure.As shown in fig. 7, its
By another structural schematic diagram for the organic light emitting display panel that the embodiment of the present invention provides, 210 institute of the first micro-cavity structure
The corresponding long Y of chamber is more than the long X of chamber corresponding to the second micro-cavity structure 220.
Second, it is long that the corresponding chamber length of the first micro-cavity structure is less than the corresponding chamber of the second micro-cavity structure.As shown in figure 8, its
By another structural schematic diagram for the organic light emitting display panel that the embodiment of the present invention provides, 210 institute of the first micro-cavity structure
The corresponding long Y of chamber is less than the long X of chamber corresponding to the second micro-cavity structure 220.In the present embodiment, centrally disposed region (second
Region 22) in the second microcavity chamber length it is larger, can guarantee in this way positive visual angle or compared with the light projected under small angle not by
It blocks, increases light emission rate.
It should be noted that Fig. 7 and sub-pixel unit illustrated in fig. 8 can be red sub-pixel and/or blue subpixels
Unit and/or green sub-pixels unit, concrete condition can be depending on specific products.
It further, in the present embodiment, can be by the thickness of change hole transmission layer, to change micro-cavity structure institute
Corresponding chamber is long, that is, on the direction perpendicular to organic light emitting display panel, the corresponding hole transmission layer of the first micro-cavity structure
The thickness of thickness hole transmission layer corresponding with the second micro-cavity structure is unequal.In conjunction with the above embodiment, such as Fig. 9 and Figure 10 institutes
Show, is another structural schematic diagram for the organic light emitting display panel that the embodiment of the present invention is provided, as shown in figure 9, the
The thickness of hole transmission layer 1331 corresponding to one micro-cavity structure is more than the hole transmission layer 1332 corresponding to the second micro-cavity structure
Thickness.As shown in Figure 10, the thickness of the hole transmission layer 1332 corresponding to the second micro-cavity structure is more than the first micro-cavity structure institute
The thickness of corresponding hole transmission layer 1331.
The present embodiment provides a kind of display devices, as shown in figure 11, the display device provided by the embodiment of the present invention
Structural schematic diagram, which includes the organic light emitting display panel 1 that is related to of the present embodiment.It should be noted that
Although Figure 11 is with mobile phone as an example, still the display device is not limited to mobile phone, specifically, the display device may include
But it is not limited to personal computer (Personal Computer, PC), personal digital assistant (Personal Digital
Assistant, PDA), radio hand-held equipment, tablet computer (Tablet Computer), MP4 players or television set etc. it is any
Electronic equipment with display function.
The display device 500 includes above-mentioned organic light emitting display panel 1, therefore in the present embodiment, will be in first area
The wavelength of the maximum glow peak for the light that first micro-cavity structure projects is adjusted, the second microcavity knot being larger than in second area
The wavelength of the maximum glow peak for the light that structure projects, that is, the intrinsic peak for going out light color in the first area in sub-pixel unit
Wavelength is more than the wavelength at the intrinsic peak for going out light color in the second area in the sub-pixel unit.Again due to being penetrated from micro-cavity structure
The resonance wavelength of the light gone out is inversely proportional with visual angle, therefore after light projects under big visual angle, although visual angle angle increases,
But the wavelength at the intrinsic peak due to going out light color also increases therewith, the resonance to the light projected under big visual angle or angle of squint
Wavelength is compensated, so that resonance wavelength of the resonance wavelength under big visual angle under positive visual angle or small angle, into
And improve the visual angle color offset phenomenon under big visual angle or angle of squint.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, it will be understood by those of ordinary skill in the art that：Its according to
So can with technical scheme described in the above embodiments is modified, either to which part or all technical features into
Row equivalent replacement；And these modifications or replacements, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (14)
1. a kind of organic light emitting display panel, which is characterized in that the organic light emitting display panel includes：
In multiple sub-pixel units of array distribution, each sub-pixel unit includes at least first area and second area；
There is the first micro-cavity structure, the second area to have the second micro-cavity structure for the first area, wherein described first is micro-
The wavelength of the maximum glow peak of cavity configuration emergent light is more than the wavelength of the maximum glow peak of the second micro-cavity structure emergent light.
2. organic light emitting display panel according to claim 1, which is characterized in that
The second area is located at the central area of the sub-pixel unit, and the first area is located at the sub-pixel unit
Neighboring area, orthographic projection of the first area in the organic light emitting display panel is with the second area described organic
Orthographic projection no overlap on light emitting display panel.
3. organic light emitting display panel as described in claim 1, which is characterized in that
The wavelength of the maximum glow peak of the first micro-cavity structure emergent light is sent out with the maximum of the second micro-cavity structure emergent light
The difference of the wavelength of photopeak is X, wherein 0nm ＜ X≤5nm.
4. organic light emitting display panel as described in claim 1, which is characterized in that
The object material in guest materials luminescent layer corresponding with the second area in the corresponding luminescent layer in the first area
Expect identical, wherein the doping concentration percentage of the guest materials in the corresponding luminescent layer in the first area is more than described second
The doping concentration percentage of guest materials in the corresponding luminescent layer in region.
5. organic light emitting display panel as described in claim 1, which is characterized in that
The sub-pixel unit includes at least the first color sub-pixels unit, the second color sub-pixels unit and third color sub- picture
Plain unit.
6. organic light emitting display panel as claimed in claim 5, which is characterized in that
The first color sub-pixels unit is red sub-pixel unit, in the red sub-pixel unit, firstth area
Object in the doping concentration percentage luminescent layer corresponding with the second area of guest materials in the corresponding luminescent layer in domain
The difference of the doping concentration percentage of material is A, 2%≤A≤7%.
7. organic light emitting display panel as claimed in claim 5, which is characterized in that
The second color sub-pixels unit is blue subpixels unit, in the blue subpixels unit, firstth area
Object in the doping concentration percentage luminescent layer corresponding with the second area of guest materials in the corresponding luminescent layer in domain
The difference of the doping concentration percentage of material is B, 6%≤B≤12%.
8. organic light emitting display panel as claimed in claim 5, which is characterized in that
The third color sub-pixels unit is green sub-pixels unit, in the green sub-pixels unit, firstth area
Object in the doping concentration percentage luminescent layer corresponding with the second area of guest materials in the corresponding luminescent layer in domain
The difference of the doping concentration percentage of material is C, 1%≤C≤5%.
9. organic light emitting display panel as described in claim 1, which is characterized in that
The object material in guest materials luminescent layer corresponding with the second area in the corresponding luminescent layer in the first area
Material is different, wherein the wavelength of the maximum glow peak of the guest materials in the corresponding luminescent layer in the first area is more than described the
The wavelength of the maximum glow peak of guest materials in the corresponding luminescent layer in two regions.
10. organic light emitting display panel as described in claim 1, which is characterized in that
It is different that the corresponding chamber of first micro-cavity structure grows chamber length corresponding from second micro-cavity structure.
11. organic light emitting display panel as claimed in claim 10, which is characterized in that
It is long that the corresponding chamber length of first micro-cavity structure is more than the corresponding chamber of second micro-cavity structure.
12. organic light emitting display panel as claimed in claim 10, which is characterized in that
It is long that the corresponding chamber length of first micro-cavity structure is less than the corresponding chamber of second micro-cavity structure.
13. organic light emitting display panel as claimed in claim 10, which is characterized in that
On the direction of the organic light emitting display panel, the thickness of the corresponding hole transmission layer of first micro-cavity structure
The thickness of degree hole transmission layer corresponding with second micro-cavity structure is unequal.
14. a kind of display device, which is characterized in that include the organic light emitting display as described in any one of claim 1 to 13
Panel.
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Effective date of registration: 20211025 Address after: No.8, liufangyuan Henglu, Donghu New Technology Development Zone, Wuhan City, Hubei Province Patentee after: WUHAN TIANMA MICRO-ELECTRONICS Co.,Ltd. Patentee after: Wuhan Tianma Microelectronics Co.,Ltd. Shanghai Branch Address before: Room 509, building 1, No. 6111, Longdong Avenue, Pudong New Area, Shanghai, 201201 Patentee before: SHANGHAI TIANMA AM-OLED Co.,Ltd. |