CN208028090U - A kind of Organic Light Emitting Diode - Google Patents
A kind of Organic Light Emitting Diode Download PDFInfo
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- CN208028090U CN208028090U CN201820171024.7U CN201820171024U CN208028090U CN 208028090 U CN208028090 U CN 208028090U CN 201820171024 U CN201820171024 U CN 201820171024U CN 208028090 U CN208028090 U CN 208028090U
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- emitting diode
- adjustment layer
- path adjustment
- light emitting
- light path
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Abstract
The utility model discloses a kind of Organic Light Emitting Diode, solve the problems, such as that existing Organic Light Emitting Diode light extraction efficiency is low.The Organic Light Emitting Diode includes the light path adjustment layer being arranged on the light direction of Organic Light Emitting Diode, and the light output surface of light path adjustment layer includes protrusion.
Description
Technical field
The utility model is related to display technology fields, and in particular to a kind of OLED (Organic Light-Emitting
Diode, Organic Light Emitting Diode).
Background technology
Fig. 1 show the structural schematic diagram of OLED in the prior art.It can be seen from the figure that the OLED10 includes under
To lower glass substrate 11, anode 12, organic luminous layer 13, cathode 14, the top glass substrate 15 being above sequentially stacked.As shown in Figure 1
The OLED light extraction efficiencies of structure are relatively low, seriously constrain the development and application of OLED.
Utility model content
In view of this, the utility model is dedicated to providing a kind of Organic Light Emitting Diode, to solve existing organic light emission two
The low problem of pole pipe light extraction efficiency.
The utility model provides a kind of Organic Light Emitting Diode, including the light direction in Organic Light Emitting Diode is arranged
On light path adjustment layer, the light output surface of light path adjustment layer includes protrusion.
In one embodiment, light path adjustment layer is arranged on the organic luminous layer of Organic Light Emitting Diode or is arranged
Between the organic luminous layer and electrode layer of Organic Light Emitting Diode or it is arranged on the electrode layer of Organic Light Emitting Diode or light
Road adjustment layer is a part for the luminescent layer of Organic Light Emitting Diode.
In one embodiment, protrusion includes multiple, and multiple protrusions are mutually parallel.
In one embodiment, the height of multiple protrusions is equal.
In one embodiment, the spacing between two neighboring protrusion is equal.
In one embodiment, longitudinal section of the protrusion on the arragement direction perpendicular to multiple protrusions is isosceles triangle.
In one embodiment, the value range of the apex angle of isosceles triangle is [90 °, 110 °].
In one embodiment, multiple protrusions include multiple repetitive units, each repetitive unit is perpendicular to multiple convex
The longitudinal section on arragement direction risen includes three isosceles triangles, wherein positioned at two acute angles point of intermediate isosceles triangle
Not and the apex angle of the isosceles triangle of both sides is adjacent.
In one embodiment, the material of light path adjustment layer includes the organic material that refractive index is more than 1.65.
In one embodiment, the material of organic optical coupling layer includes acrylic resin.
In one embodiment, light path adjustment layer includes the first light path adjustment layer and the adjustment of the second light path stacked above and below
Layer, first has the arrangement side of the arragement direction and multiple protrusions in the second light path adjustment layer of multiple protrusions in light path adjustment layer
To being mutually perpendicular to.
According on the light direction of Organic Light Emitting Diode provided by the utility model include light path adjustment layer, the light path tune
The setting of flood improves the luminous efficiency of organic luminous layer in Organic Light Emitting Diode in terms of two, is on the one hand to use to have
On the other hand machine material preparation light path adjustment layer is the light output surface setting protrusion in light path adjustment layer.
Description of the drawings
Fig. 1 show the structural schematic diagram of OLED in the prior art.
Fig. 2 a show the cross section structure schematic diagram of OLED of one embodiment of the utility model offer a kind of.
Fig. 2 b show the structural schematic diagram of the light path adjustment layer in OLED shown in Fig. 2 a.
Fig. 2 c show the emergent ray schematic diagram of light path adjustment layer light-emitting surface in OLED shown in Fig. 2 a.
Fig. 3 show the structural schematic diagram of the light path adjustment layer in the OLED of one embodiment of the utility model offer.
Fig. 4 show the partial cross section's structural schematic diagram for the light path adjustment layer that another embodiment of the utility model provides.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
It clearly and completely describes, it is clear that described embodiment is only the utility model a part of the embodiment, rather than whole realities
Apply example.Based on the embodiments of the present invention, those of ordinary skill in the art institute without creative efforts
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Fig. 2 a show the cross section structure schematic diagram of OLED of one embodiment of the utility model offer a kind of.Fig. 2 b are shown
The structural schematic diagram of light path adjustment layer 25 in OLED shown in Fig. 2 a.It is specific that the OLED20 is can be seen that in conjunction with Fig. 2 a and Fig. 2 b
Including lower substrate 21, anode 22, organic luminous layer 23, the cathode 24 being stacked from top to bottom, and there is surface micro-structure
Light path adjustment layer 25, the upper surface of light path adjustment layer 25 includes the protrusion 251 of multiple continuitys arrangements, and multiple continuity is arranged
The protrusion 251 of cloth is mutually parallel.
OLED can be divided into two kinds of top-emission type and bottom emitting by the exit direction difference of light, and the OLED20 in the present embodiment is
Top-emission type OLED, i.e., the OLED that the light that organic luminous layer 23 is sent out is projected from transparent cathode 24, for top-emission type OLED, such as
Shown in Fig. 2 a, light path adjustment layer 25 is arranged on cathode 24.It will be understood by those skilled in the art that when OLED is bottom emitting
When OLED, i.e., the OLED (anode at this time is transparent anode) that light path adjustment layer 23 is sent out light is projected from anode, light path adjustment
Layer 25 should be arranged on anode.That is, light path adjustment layer 25 should be arranged on the light direction of OLED, accordingly
The surface micro-structure on ground, light path adjustment layer 25 should be also arranged on the light output surface of light path adjustment layer 25.And light path adjustment layer
25 can also be actually arranged between organic luminous layer 23 and electrode, or be arranged on organic luminous layer 23, or even can
To be a part for organic luminous layer 23.The utility model is not construed as limiting the specific location of light path adjustment layer 25.
In one embodiment, the height of the protrusion 251 of multiple continuity arrangements is equal, while per two adjacent protrusions
Spacing between 251 is equal, and the spacing between every two adjacent protrusions 251 refers to two neighboring raised 251 peak
The distance between, such as the d in attached drawing.Light can be made to be more evenly distributed in this way, it will be understood by those skilled in the art that specifically answering
With can also only be arranged in the process, height is equal or only setting spacing is equal.
In one embodiment, as shown in Figure 2 a and 2 b, each protrusion 251 is perpendicular to the arrangement side of multiple protrusions
Upward longitudinal section is triangle, which is isosceles triangle, the value range of the vertex angle theta of isosceles triangle be [90 °,
110 °], preferably 90 °, the value range of the height h of isosceles triangle be (0,20] micron, between two neighboring isosceles triangle
Distance d value range be (20,50) micron.
According to OLED provided in this embodiment, by the way that the light path tune with surface micro-structure is arranged on transparent cathode 24
Flood 25 improves the light extraction efficiency of organic luminous layer 23, and surface micro-structure improves light source actually in terms of two
Light extraction efficiency, on the one hand, it is because of surface to know that surface micro-structure can improve light extraction efficiency by Gsolver software emulations
Micro-structure can destroy waveguiding effect well so that light source light extraction efficiency improves nearly 4 times；On the other hand, surface micro-structure
It is matched with the stronger reflection action of metal electrode, realizes that the huge profit of reflected light is used.
2c specifically describes surface micro-structure below in conjunction with the accompanying drawings and metal electrode matches the principle for improving light extraction efficiency.Figure
2c show the emergent ray schematic diagram of 25 light-emitting surface of light path adjustment layer in OLED shown in Fig. 2 a.As shown in Figure 2 c, from light path tune
The light that the light output surface of flood 25 projects is segmented into four classes, the first kind, inner total reflection light, such as light according to the difference of incidence angle
Shown in the L1 of path；Second class reflects positive light, as shown in opticpath L2 and L3；Third class is damaged in the communication process of light
The light lost.
For first kind light, as shown in opticpath L1, when the light that organic luminous layer 23 is sent out reaches light path adjustment layer 25
Light-emitting surface when, incident light meets total reflection condition, which occurs in the light path adjustment layer 25 to repeat to be totally reflected, most
It is projected afterwards into smooth surface by light path adjustment layer 25, it, can be by metal anode 22 when the part, reflected light is irradiated to metal anode 22
It reflects, and is recycled, which accounts about the 50% of entire total reflection light gross energy.
For the second class light, which acts on less, so in practice for the light extraction efficiency for improving organic luminous layer 23
And it includes two parts that the part light is practical, a part is as shown in opticpath L2, and due to the part, light is unsatisfactory for total reflection condition
And be concentrated within the scope of 70 ° of positive visual angle, to improve positive briliancy (briliancy is the subjective feeling to luminous intensity,
To illustrate the intensity of surface emissivity light)；For another part as shown in opticpath L3, which projects light path adjustment layer 25
Next protrusion can be entered after light output surface.
For third class light, since the light lost is seldom, which can be ignored.
As the above analysis, the reflected light of surface micro-structure by light path adjustment layer 25, passes through metal electrode
Stronger reflex realizes the huge profit use to reflected light, in the certain feelings of the gross energy for the light that organic luminous layer 23 is sent out
Under condition, light extraction efficiency is increased.
In one embodiment, light path adjustment layer 25 is made of organic material, and organic material has compared to inorganic material
There is higher refractive index, light extraction effect is more preferable, therefore in the case where the gross energy for the light that organic luminous layer 23 is sent out is certain,
For inorganic material, organic material can further increase the light extraction efficiency of organic luminous layer 23.
The organic material preferred index that light path adjustment layer 25 in the utility model uses is more than 1.65 organic material,
Such as refractive index is more than 1.7 acrylic resin, the value range of the thickness D of light path adjustment layer is [150,230] micron.
Fig. 3 show the structural schematic diagram of the light path adjustment layer 30 in the OLED of one embodiment of the utility model offer.From
It includes as shown in Figure 2 b having for stacked two layers above and below that Fig. 3, which can be seen that according to light path adjustment layer 30 provided in this embodiment,
The light path adjustment layer 25 of surface micro-structure, i.e. the first light path adjustment layer 251 and the second light path adjustment layer 252, the adjustment of the first light path
The arragement direction of multiple protrusions in the arragement direction and the second light path adjustment layer 252 of multiple protrusions in layer 251 is mutually perpendicular to.
According to upper and lower two layers of light path adjustment layer structure provided in this embodiment, it can further destroy waveguiding effect and carry
Height is to the heavy utilization rate of reflected light, to further increase the light extraction efficiency of light source.
Fig. 4 show the partial cross section's structural schematic diagram for the light path adjustment layer that another embodiment of the utility model provides.From
The upper surface that Fig. 4 can be seen that the light path adjustment layer 40 includes the protrusion of multiple continuity arrangements, multiple continuity arrangement
Protrusion is mutually parallel, and is a repetitive unit 41 per adjacent three protrusions, the repetitive unit 41 is in prolonging perpendicular to multiple protrusions
Stretch the isosceles triangle that the longitudinal section on direction includes three arranged adjacents, the present embodiment by taking isosceles right triangle as an example,
In, it is located at the right angle of two isosceles right triangle of two acute angles of intermediate isosceles right triangle respectively and positioned at both sides
It is adjacent, the value range of the height H of three isosceles right triangles be (0,20] micron.
It can also be by using organic material and setting surface micro-structure according to light path adjustment layer 40 provided in this embodiment
Two aspects improve the light extraction efficiency of organic luminous layer in OLED.
In one embodiment, the light path adjustment layer in OLED includes as shown in Figure 4 having table stacked two layers above and below
The light path adjustment layer 40 of face micro-structure, i.e. the first light path adjustment layer and the second light path adjustment layer are more in the first light path adjustment layer
The arragement direction of multiple protrusions in the arragement direction of a protrusion and the second light path adjustment layer is mutually perpendicular to.
According to upper and lower two layers of light path adjustment layer structure provided in this embodiment, it can further destroy waveguiding effect and carry
For the heavy utilization rate to reflected light, to further increase the light extraction efficiency of light source.
It will be understood by those skilled in the art that according to the protrusion in the light path adjustment layer of the utility model any embodiment
Quantity can be one or more, this utility model is not construed as limiting this.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, made by any modification, equivalent replacement etc., should be included in the protection of the utility model
Within the scope of.
Claims (8)
1. a kind of Organic Light Emitting Diode, which is characterized in that including being arranged on the light direction of the Organic Light Emitting Diode
Light path adjustment layer, the light output surface of the light path adjustment layer includes protrusion, and the protrusion includes multiple, and multiple protrusions are mutually flat
Row, longitudinal section of the protrusion on the arragement direction perpendicular to the multiple protrusion is isosceles triangle.
2. Organic Light Emitting Diode as described in claim 1, which is characterized in that the light path adjustment layer is arranged described organic
Between the organic luminous layer and electrode layer of light emitting diode or it is arranged on the electrode layer of the Organic Light Emitting Diode or institute
State a part for the luminescent layer that light path adjustment layer is the Organic Light Emitting Diode.
3. Organic Light Emitting Diode as described in claim 1, which is characterized in that the height of the multiple protrusion is equal.
4. Organic Light Emitting Diode as described in claim 1, which is characterized in that the spacing between two neighboring protrusion is equal.
5. Organic Light Emitting Diode as described in claim 1, which is characterized in that the value model of the apex angle of the isosceles triangle
It encloses for [90 °, 110 °].
6. Organic Light Emitting Diode as described in claim 1, which is characterized in that the multiple protrusion includes that multiple repetitions are single
Member, longitudinal section of each repetitive unit on the arragement direction perpendicular to the multiple protrusion include three isosceles right angle trigonometries
Shape, wherein being located at the right angle of isosceles right triangle of two acute angles of intermediate isosceles right triangle respectively and positioned at both sides
It is adjacent.
7. Organic Light Emitting Diode as described in claim 1, which is characterized in that the refractive index of the light path adjustment layer is more than
1.65。
8. the Organic Light Emitting Diode as described in any in claim 1-7, which is characterized in that the light path adjustment layer includes
Stacked the first light path adjustment layer and the second light path adjustment layer above and below, the row of multiple protrusions in the first light path adjustment layer
The arragement direction of multiple protrusions in cloth direction and the second light path adjustment layer is mutually perpendicular to.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820171024.7U CN208028090U (en) | 2018-01-31 | 2018-01-31 | A kind of Organic Light Emitting Diode |
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| CN201820171024.7U CN208028090U (en) | 2018-01-31 | 2018-01-31 | A kind of Organic Light Emitting Diode |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111584746A (en) * | 2020-05-13 | 2020-08-25 | 武汉华星光电半导体显示技术有限公司 | Display panel, preparation method thereof and display device |
-
2018
- 2018-01-31 CN CN201820171024.7U patent/CN208028090U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111584746A (en) * | 2020-05-13 | 2020-08-25 | 武汉华星光电半导体显示技术有限公司 | Display panel, preparation method thereof and display device |
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