CN204179112U - Organic illuminating element and display unit, lighting device - Google Patents
Organic illuminating element and display unit, lighting device Download PDFInfo
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- CN204179112U CN204179112U CN201420693766.8U CN201420693766U CN204179112U CN 204179112 U CN204179112 U CN 204179112U CN 201420693766 U CN201420693766 U CN 201420693766U CN 204179112 U CN204179112 U CN 204179112U
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Abstract
The utility model embodiment discloses a kind of organic illuminating element and lighting device, display unit, relates to display field, can solve the problem that existing OLED light extraction efficiency is low, and suitable volume production.Organic illuminating element of the present utility model, comprising: light takes out film; Be formed at the organic luminescent device on described light taking-up film; Cover the first encapsulant layer on described organic luminescent device.
Description
Technical field
The utility model relates to display field, particularly relates to a kind of organic illuminating element and lighting device, display unit.
Background technology
Organic light emission (Organic Light Emitting Diode, OLED) device owing to possessing self-luminous simultaneously, there is flexibility, serviceability temperature scope is wide, structure and the excellent specific property such as processing procedure is simple, is widely used in the aspects such as display and illumination.
But there is theoretical boundary in the external quantum efficiency of OLED (EQE, External quantum efficiency, definition is: the electron number of the number of photons/input of output), is only about 20% ~ 25%.At present, when not having special light to take out structure, the light extraction efficiency of OLED is generally only about 20% ~ 25%, and this is the bottleneck place of OLED.For improving the light extraction efficiency of OLED, design multiple light at present and take out structure, but the mode wherein only having outer subsides light to take out film (Out coupling Film) being convenient to volume production.
Be illustrated in figure 1 the structural representation that a kind of outer subsides light takes out the OLED of film, comprise successively from top to bottom: the first encapsulant layer 12, OLED 11, flexible base, board 10, water oxygen intercept base material (Flexible barriersubstrate) 13 and light takes out film 14.During making, first flexible base, board 10 is affixed on (not shown) on glass; OLED 11 is made on flexible base, board 10; Then utilize packing material to fill, form the first encapsulant layer 12; Then glass is peeled off, stick water oxygen and intercept base material (Flexible barrier substrate) 13, intercept the outer light that sticks again of base material 13 at water oxygen and take out film 14.Said structure can improve the light extraction efficiency of OLED to a certain extent, but still there is some light (A as in figure) horizontal transmission in the organic layer and flexible base, board 10 of OLED to penetrate, cause the light extraction efficiency of OLED to improve limited.
Utility model content
The utility model provides a kind of organic illuminating element and lighting device, display unit, can solve the problem that existing OLED light extraction efficiency is low, and suitable volume production.
For achieving the above object, embodiment of the present utility model adopts following technical scheme:
A kind of organic illuminating element, comprising: light takes out film; Be formed at the organic luminescent device on described light taking-up film; Cover the first encapsulant layer on described organic luminescent device.
Preferably, described organic luminescent device comprises the first rete taking out film with described light and directly contact, and the refractive index that described light takes out film is more than or equal to the refractive index of described first rete.
Preferably, described light takes out the refractive index of film is 1.8 ~ 2.2.
Preferably, the refractive index of described first encapsulant layer is 1.5 ~ 2.2.
Preferably, described light takes out film inside and is provided with multiple scattering particles.
Further, described organic illuminating element also comprises: water oxygen intercepts base material, is arranged at described light and takes out the surface of film away from described organic luminescent device.
Preferably, described light takes out film and described water oxygen to intercept the one side that base material contacts is roughness.
Preferably, described light taking-up film and described water oxygen intercept between base material and are provided with the second encapsulant layer, and the refractive index of described second encapsulant layer is equal with the refractive index that described light takes out film.
Preferably, the refractive index of described second encapsulant layer and described light taking-up film is all equal with the refractive index of described first rete.
Preferably, the refractive index of described water oxygen obstruct base material is more than or equal to the refractive index that described light takes out film.
The utility model embodiment also provides a kind of display unit, comprising: the organic illuminating element described in any one.
The utility model embodiment also provides a kind of lighting device, comprising: the organic illuminating element described in any one.
The organic illuminating element that the utility model embodiment provides and display unit, lighting device, organic luminescent device being directly formed at light takes out on film, wherein, the effect that light takes out film makes the some light of horizontal transmission in the organic layer and flexible base, board of OLED originally have an opportunity to penetrate, thus solve the low problem of existing OLED light extraction efficiency, and the simply suitable volume production of structure.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation that existing a kind of outer subsides light takes out the OLED of film;
The structural representation of the organic illuminating element that Fig. 2 the utility model embodiment provides.
Reference numeral
10-flexible base, board, 11-OLED, 12-first encapsulant layer, 13-water oxygen intercepts base material, and 14-light takes out film, 15-space.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.
The utility model embodiment provides a kind of organic illuminating element, and as shown in Figure 2, this organic illuminating element comprises: light takes out film 14; Be formed at the organic luminescent device (OLED) 11 on light taking-up film 14; Cover the first encapsulant layer 12 on organic luminescent device 11.
Wherein, the effect that light takes out film 14 makes the some light of horizontal transmission in the organic layer and flexible base, board of OLED originally have an opportunity to penetrate, as shown in the light A in Fig. 2, thus solve the low problem of existing OLED light extraction efficiency, and the simply suitable volume production of structure.
Further, shown in Fig. 2, organic illuminating element also comprises: water oxygen intercepts base material 13, and be overlying on described light from below and take out on film 14, the water vapour in obstruct air and oxygen are to the corrosion of OLED (mainly anode electrode).
During making, first light is taken out film 14 and be formed at or be affixed on (also can be other hard carrier) on glass; Then organic luminescent device 11 being made in light takes out on film 14; Utilize packing material to fill, form the first encapsulant layer 12; Then glass is peeled off, stick water oxygen and intercept base material (Flexible barriersubstrate) 13.Visible, adopt the structure that the utility model provides, without the need to carrying out large change to existing processing procedure, and can save flexible base, board, further simplified structure increases light extraction efficiency simultaneously, very suitable volume production.
As shown in Figure 2, preferably, light described in the present embodiment takes out film 14 inside and is provided with multiple scattering particles, can avoid light horizontal transmission, improves light extraction efficiency.If there is no scattering particles, light takes out at upper and lower interface multiple reflections in film 14 at light, thus horizontal transmission can not be penetrated, and affects light extraction efficiency.Further preferably, be improve light extraction efficiency, light can be taken out film 14 and water oxygen and intercept the one side that base material 13 contacts and be designed to roughness, penetrate probability to increase light and penetrate the scattering of light.
In addition alternatively, the present embodiment light taking-up film 14 and water oxygen intercept between base material 13 and also can be provided with the second encapsulant layer, the refractive index of described second encapsulant layer is equal with the refractive index that light takes out film 14, light the second encapsulant layer and light take out propagate in film 14 time as same medium, can not because occurring at interface to reflect and loss, therefore light extraction efficiency can improve further.Still more preferably, the refractive index of described second encapsulant layer and described light taking-up film is all equal with the refractive index of described first rete.
In a kind of embodiment, light takes out film 14 and water oxygen and intercepts the one side that base material 13 contacts and be designed to roughness, thus light taking-up film 14 intercepts base material 13 with water oxygen and easily there is space 15, complete OLED 11 processing procedure, OLED 11 applies gluey packing material when filling, packing material (material being namely equivalent to the second encapsulant layer is identical with the material of the first encapsulant layer 12) is often also filled in space 15, therefore, at this moment preferably, first encapsulant layer 12 is equal with the refractive index that light takes out film 14, light is when propagating, even if meet the first encapsulant layer 12 in space 15, also can as at a kind of Medium Propagation, can not because occurring at interface to reflect and loss, therefore light extraction efficiency can improve further.
Further, in order to obtain higher light extraction efficiency, each rete (mainly optical performance parameter) in above-mentioned organic illuminating element can be optimized, especially light takes out the refractive index of film 14 and the first encapsulant layer 12, enumerates several concrete execution mode below and is described.
In a kind of preferred implementation of the present embodiment, described organic luminescent device 11 comprises the first rete taking out film 14 with light and directly contact, and the refractive index that above-mentioned light takes out film 14 is more than or equal to the refractive index of the first rete.Organic luminescent device 11 comprises the multiple rete of anode electrode layer, organic luminous layer and negative electrode layer, and the first described rete is take out the rete that film 14 directly contacts with light.Generally speaking, described first rete anode electrode layer often, and anode electrode layer is generally made up of ITO (Indium Tin Oxide, transparency conducting layer) material, refractive index about 1.8, so the refractive index that light takes out film is generally 1.8 ~ 2.2.
According to optical knowledge, when light injects optically thinner medium (refractive index is relatively little) from optically denser medium (refractive index is relatively large), if incidence angle is greater than critical angle, namely there is total reflection, namely light almost all reflects in interface, only there is reflection ray, there is not the light of refraction injection.For the light avoided is because total reflection occurs, thus cause light extraction efficiency to reduce, the refractive index needing light to take out film 14 is more than or equal to the refractive index of the first rete.Analogously, the refractive index of water oxygen obstruct base material 13 is preferably also more than or equal to the refractive index that light takes out film 14.
The one of the present embodiment is more in preferred implementation, and the refractive index that light takes out film 14 is more than or equal to the refractive index of the first rete, and the refractive index of the first encapsulant layer 12 is equal with the refractive index that light takes out film 14.First encapsulant layer 12 is equal with the refractive index that light takes out film 14, light the first encapsulant layer 12 and light takes out propagate in film 14 time as same medium, can not the loss because there is reflection at interface, therefore light extraction efficiency can raising further.
Analogously, the refractive index of existing first encapsulant layer 12 is generally about 1.5, makes light easily with the interface of OLED11, total reflection occur at the first encapsulant layer 12 and can not penetrate, affects light extraction efficiency.Therefore preferably, described in the present embodiment, the first encapsulant layer 12 adopts high-index material, as long as in refractive index between 1.5 ~ 2.2, can improve light extraction efficiency.
In 3rd preferred implementation of the present embodiment, the refractive index of light taking-up film 14 is more than or equal to the refractive index of the first rete, and the refractive index that the first encapsulant layer 12, light take out film 14 is all equal with the refractive index of the first rete.Reason is identical, repeats no more.
In 4th preferred implementation of the present embodiment, take out the first rete that film 14 directly contacts in organic luminescent device 11 to be made up of ITO material with light, refractive index about 1.8, the first encapsulant layer 12, light take out film 14 and water oxygen intercept base material 13 also adopt refractive index close to 1.8 high-index material.
During concrete enforcement, the selection of taking out film 14 at the first rete, the first encapsulant layer 12 and light is meeting under the prerequisite required in respective other, if the condition that three's refractive index is equal can not be met, then the first encapsulant layer 12 and light also can be made to take out the refractive index of film 14 as far as possible close to the refractive index of described first rete.
The organic illuminating element that the utility model embodiment provides, organic luminescent device being directly formed at light takes out on film, wherein, the effect that light takes out film makes the some light of horizontal transmission in the organic layer and flexible base, board of OLED originally have an opportunity to penetrate, thus solve the low problem of existing OLED light extraction efficiency, and the simply suitable volume production of structure.
The utility model embodiment also provides a kind of display unit, comprising: it comprises any one organic illuminating element above-mentioned.The display unit that the utility model embodiment provides, light taking-up effect is high, and display effect is better, and energy saving.Described display unit can be: any product or parts with Presentation Function such as oled panel, Electronic Paper, mobile phone, panel computer, television set, display, notebook computer, DPF, navigator.
Utility model embodiment also provides a kind of lighting device, comprising: it comprises any one organic illuminating element above-mentioned, and light taking-up effect is high, and display effect is better, and energy saving.
It should be noted that, under the prerequisite of not conflicting, the technical characteristic in each embodiment of the utility model can be combined arbitrarily.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, between each embodiment identical similar part mutually see, what each embodiment stressed is the difference with other embodiments, and relevant part illustrates see the part of embodiment of the method.
The above; be only embodiment of the present utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the change that can expect easily or replacement, all should be encompassed within protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of claim.
Claims (12)
1. an organic illuminating element, is characterized in that, comprising:
Light takes out film;
Be formed at the organic luminescent device on described light taking-up film;
Cover the first encapsulant layer on described organic luminescent device.
2. organic illuminating element according to claim 1, is characterized in that,
Described organic luminescent device comprises the first rete taking out film with described light and directly contact, and the refractive index that described light takes out film is more than or equal to the refractive index of described first rete.
3. organic illuminating element according to claim 1, is characterized in that,
The refractive index that described light takes out film is 1.8 ~ 2.2.
4. organic illuminating element according to claim 1, is characterized in that,
The refractive index of described first encapsulant layer is 1.5 ~ 2.2.
5. the organic illuminating element according to any one of claim 1-4, is characterized in that, described light takes out film inside and is provided with multiple scattering particles.
6. the organic illuminating element according to any one of claim 1-4, is characterized in that, also comprises:
Water oxygen intercepts base material, is arranged at described light and takes out the surface of film away from described organic luminescent device.
7. organic illuminating element according to claim 6, is characterized in that, described light takes out film and described water oxygen, and to intercept the one side that base material contacts be roughness.
8. organic illuminating element according to claim 6, is characterized in that, described light taking-up film and described water oxygen intercept between base material and is provided with the second encapsulant layer, and the refractive index of described second encapsulant layer is equal with the refractive index that described light takes out film.
9. organic illuminating element according to claim 8, is characterized in that,
The refractive index that described second encapsulant layer and described light take out film is all equal with the refractive index of described first rete.
10. organic illuminating element according to claim 6, is characterized in that, the refractive index that described water oxygen intercepts base material is more than or equal to the refractive index that described light takes out film.
11. 1 kinds of display unit, is characterized in that, comprising: the organic illuminating element described in any one of claim 1-10.
12. 1 kinds of lighting devices, is characterized in that, comprising: the organic illuminating element described in any one of claim 1-10.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420693766.8U CN204179112U (en) | 2014-11-18 | 2014-11-18 | Organic illuminating element and display unit, lighting device |
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| CN201420693766.8U CN204179112U (en) | 2014-11-18 | 2014-11-18 | Organic illuminating element and display unit, lighting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110277505A (en) * | 2018-03-14 | 2019-09-24 | 江苏三月光电科技有限公司 | Organic electroluminescence device with mixing coating |
| CN110444688A (en) * | 2019-08-15 | 2019-11-12 | 昆山国显光电有限公司 | The production method and display device of display panel, display panel |
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2014
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110277505A (en) * | 2018-03-14 | 2019-09-24 | 江苏三月光电科技有限公司 | Organic electroluminescence device with mixing coating |
| CN110444688A (en) * | 2019-08-15 | 2019-11-12 | 昆山国显光电有限公司 | The production method and display device of display panel, display panel |
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