CN109844975A - Organic light emitting display and method for manufacturing organic light emitting display - Google Patents
Organic light emitting display and method for manufacturing organic light emitting display Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims description 12
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- 239000000758 substrate Substances 0.000 claims abstract description 89
- 239000000463 material Substances 0.000 claims abstract description 66
- 229920000642 polymer Polymers 0.000 claims abstract description 60
- 239000002245 particle Substances 0.000 claims abstract description 47
- 229920005601 base polymer Polymers 0.000 claims description 16
- 238000006116 polymerization reaction Methods 0.000 claims 1
- 230000001133 acceleration Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
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- 238000007796 conventional method Methods 0.000 description 3
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- 239000004020 conductor Substances 0.000 description 2
- 238000013007 heat curing Methods 0.000 description 2
- 238000011086 high cleaning Methods 0.000 description 2
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 2
- MRNHPUHPBOKKQT-UHFFFAOYSA-N indium;tin;hydrate Chemical compound O.[In].[Sn] MRNHPUHPBOKKQT-UHFFFAOYSA-N 0.000 description 2
- 238000004020 luminiscence type Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229920006254 polymer film Polymers 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
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- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
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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
- H10K59/80—Constructional details
- H10K59/875—Arrangements for extracting light from the devices
- H10K59/877—Arrangements for extracting light from the devices comprising scattering means
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Abstract
The present embodiments relate to a kind of organic light emitting displays (100) with externally embedded type configuration, it include: Organic Light Emitting Diode unit (110), and it is set to the first coating (120) on the Organic Light Emitting Diode unit (110), first coating (120) includes first foundation polymer (122) and intersperses among the scattering particles (121) in the first foundation polymer (122), wherein, the Organic Light Emitting Diode unit (100) includes: first substrate (111), the first electrode layer (112) being set on the first substrate (111), the organic luminous layer (113) being set on the first electrode layer (112), it the second electrode lay (114) that is set on the organic luminous layer (113) and sets The second substrate (115) being placed on the second electrode lay (114), wherein, first coating (120) is set in the second substrate (115), the refractive index of the first foundation polymer (122) is higher than the Refractive Index of Material of the second substrate (115), and the Refractive Index of Material of the scattering particles (121) is higher than the refractive index of the first foundation polymer (122).
Description
Invention field
The present invention relates to a kind of organic light emitting display and a kind of methods for manufacturing organic light emitting display.
Background technique
Organic Light Emitting Diode (organic light emitting diode, OLED) display is using comprising organic
Display of the Organic Light Emitting Diode of compound as luminescent material.Since OLED has in terms of luminous efficiency and low-power consumption
Advantage, so the cry that OLED display becomes the main trend of next-generation display equipment is very high.
In general, OLED includes first substrate, cathode layer, organic luminous layer, anode layer and the second substrate.These layers make
Structure is divided into the pixel of display.First and second substrates are made of glass, thin polymer film or their combination.Glass
Or thin polymer film may include coating.In general, the above configuration is known as " OLED display unit ".
Fig. 8 show the schematic diagram using the OLED display 400 of traditional OLED display unit 410 as described above.From
The light that the organic luminous layer 413 of OLED display 400 emits passes through the second electrode lay 414 and the second substrate 415, and it is aobvious to project OLED
Show device 400 and enters in environment.The second electrode lay 414 can be to be had by tin indium oxide (indium-tin-oxide, ITO) etc.
Anode made of the conductive material of the transparency.The material of the second substrate 415 can be the material that glass and plastics etc. have the transparency
Material.Constitute the refractive index of the material of the organic luminous layer 413 of OLED display 400, the second electrode lay 414 and the second substrate 415
It is different and be higher than air refraction.In general, refractive index reduces in the following order: the material of organic luminous layer, second
The material of electrode layer, the material of the second substrate, air.For example, the Refractive Index of Material of organic luminous layer 413, the second electrode lay 414
Refractive Index of Material, the second substrate 415 Refractive Index of Material and air refraction may respectively be about 1.8, about 1.7, about 1.5 peace treaties
1.0.Since the Refractive Index of Material of each layer is different, so biggish light loss can occur when light passes through the interface of each layer.It is this
Light loss can be described further below.
In fig. 8, by the way that following equation describes Snell's laws:
n1Sinθ1=n2Sinθ2=n3Sinθ3=n4Sinθ4,
Wherein, niIt is the refractive index of the material for the layer that light is passed through, θiIt is the angle between the normal of layer and optical propagation direction
(incidence angle and the angle of emergence on interface), index i=1 correspond to organic luminous layer, and i=2 corresponds to the second electrode lay, i=3 correspondence the
Two substrates, i=4 correspond to air.
Output angle θ on each bed boundaryiWhen being 90 degree, incidence angle is known as critical angle.When the angle of incidence is larger than a critical angle,
Light can not pass through interface, but the institute of light is important all to reflect on the surface.This phenomenon is known as being totally reflected.This total reflection
It may occur on each interface of each layer.The Refractive Index of Material of each layer by being applied to the equation of Snell's law by critical angle
To derive.
Light loss on interface caused by as this total reflection is due to the difference between the Refractive Index of Material of each layer.
According to Snell's law, when light enters the low material of refractive index from the high material of refractive index, the angle of emergence becomes larger than incidence angle.
As discussed above, the refractive index of each layer of traditional OLED displays 400 reduces in the following order: the material of organic luminous layer 413
Material, the material of the second electrode lay 414, the material of the second substrate 415, air.Therefore, when interface when light across each layer,
Incidence angle and the angle of emergence become larger.As shown in figure 9, when the angle of emergence is larger, the strength reduction of emergent light, therefore at the interface of each layer
Upper generation light loss.When incidence angle is more than critical angle, light is fully reflective on interface, therefore does not project OLED display.
On interface between the different layer of refractive index, due to aforementioned snell law, it may occur that reflection and refraction, without
It is refraction and total reflection.This reflection and refraction are known as Fresnel reflection.Fresnel reflection follows equation as follows.
Wherein, Rs and Rp indicates respectively the reflectivity of S-polarization and P polarization.
Figure 10 show with regard to it is aforementioned reflection and refraction for, for light from the second electrode lay 414 pass through the second substrate 415 to
Up to the analog result figure of the light loss of the transmissivity in air.As shown in Figure 10, refractive index is bigger, passes through the second substrate for light
The light loss of 415 transmissivity is bigger.
In order to solve the light loss problem on interface, No. 2015/053529 PCT International Publication text of WO proposes one
Kind forms the configuration of concavo-convex interface on the surface of the second substrate.No. 2,523,859 UK Patent Applications of GB propose a kind of packet
The configuration of the second substrate containing scattering particles.These configurations are intended to reduce the boundary between the second substrate and air in the following way
Light loss on face: before the biggish light of the angle of emergence enters air, light is scattered.In addition, those skilled in the art are
Know following configuration: an extra play is provided, the refractive index of the extra play is higher than the second electrode of OLED display 400 shown in Fig. 8
The refractive index of the material of the second electrode lay 414 between layer 414 and the second substrate 415.Due in the structure that these are configured, institute
There is layer to be all encapsulated between first substrate 411 and the second substrate 415, so these configurations are referred to as " embedded configuration ".Having
In the OLED display for having embedded configuration, since the Refractive Index of Material of the second substrate 415 is lower than the Refractive Index of Material of extra play,
So light loss still occurs on interface between extra play and the second substrate.In addition, because being carried out by the second substrate 415
The process that each layer is formed before encapsulation needs high-cleanness, high, so the formation of extra play must carry out in toilet, this causes
Manufacturing process is complicated and manufacturing cost is high.Since what the second substrate carried out is encapsulated in progress after extra play is formed, so necessary
Using the material with heat resistance and chemical durability as extra play, to avoid being damaged in the process.Further, since the
Method disclosed in No. 2,523,859 UK Patent Applications of WO2015/053529 PCT International Publication text and GB needs
The second substrate itself is manufactured, so manufacturing process becomes more sophisticated and manufacturing cost becomes higher.
The purpose of the present invention is reduce the light loss on the interface between each layer of this OLED display and solve by
In embedded configuration the problem of cause.
Summary of the invention
According to an aspect of the invention, there is provided a kind of organic light emitting display with externally embedded type configuration, described to have
Machine active display includes:
Organic Light Emitting Diode unit；And
The first coating being set on the Organic Light Emitting Diode unit, first coating includes first foundation
Polymer and the scattering particles in the first foundation polymer is interspersed among,
Wherein, the Organic Light Emitting Diode unit includes:
First substrate；
The first electrode layer being set on the first substrate；
The organic luminous layer being set in the first electrode layer；
The second electrode lay being set on the organic luminous layer；And
The second substrate being set on the second electrode lay,
Wherein, first coating is set in the second substrate,
The refractive index of the first foundation polymer is higher than the Refractive Index of Material of the second substrate, and
The Refractive Index of Material of the scattering particles is higher than the refractive index of the first foundation polymer.
First coating with features above, which reduces, to be totally reflected and light efficiency is improved.
In the one aspect of the application, the opposing surfaces of first coating contacted with the second substrate
Surface is concave-convex.
The convex-concave surface of first coating, which further reduces, to be totally reflected and light efficiency is improved.
In one aspect of the invention, the organic light emitting display further includes the second coating, second covering
On the surface for the opposing surfaces contacted with the second substrate that layer is set to first coating, second coating
Including the second base polymer,
Wherein, the refractive index of second base polymer is lower than the refractive index of the first foundation polymer.
Second coating with features above, which further reduces, to be totally reflected and light efficiency is improved.
In the one aspect of the application, the opposing surfaces of second coating contacted with first coating
Surface be concave-convex.
The convex-concave surface of second coating, which further reduces, to be totally reflected and light efficiency is improved.
According to an aspect of the invention, there is provided a kind of manufacture has the side of the organic light emitting display of externally embedded type configuration
Method, which comprises
Organic light emitting diode is provided, the Organic Light Emitting Diode unit include: first substrate, be set to it is described
First electrode layer on first substrate, is set to the organic light emission at the organic luminous layer being set in the first electrode layer
The second electrode lay on layer and the second substrate being set on the second electrode lay；
First foundation polymer is coated on the second substrate, and the first foundation polymer includes scattering particles；With
And
Solidify the first foundation polymer to form the first coating,
Wherein, the refractive index of the first foundation polymer is higher than the Refractive Index of Material of the second substrate, and
The Refractive Index of Material of the scattering particles is higher than the refractive index of the first foundation polymer.
First coating with features above, which reduces, to be totally reflected and light efficiency is improved.
In one aspect of the invention, solidifying the first foundation polymer to form the step of first coating
In rapid, concave-convex pattern is formed on the surface of first coating.
The convex-concave surface of first coating, which further reduces, to be totally reflected and light efficiency is improved.
In one aspect of the invention, the method also includes:
The second base polymer is coated on first coating；And
Solidify second base polymer to form the second coating,
Wherein, the refractive index of second base polymer is lower than the refractive index of the first foundation polymer.
Second coating with features above, which further reduces, to be totally reflected and light efficiency is improved.
Detailed description of the invention
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 technical description to be briefly described.
Fig. 1 show the sectional view of organic light emitting display according to a first embodiment of the present invention.
Fig. 2 show the refractive index of first foundation polymer and passes through the relevant light efficiency of the transmissivity of the first coating to light
The analog result of relationship between rate.
Fig. 3 show the diffusivity for the light being scattered by scattering particles and passes through the transmissivity of the first coating with light
The analog result of relationship between relevant light efficiency.
Fig. 4 show the refractive index of first foundation polymer, the diffusivity for the light being scattered by scattering particles and with
The analog result of relationship of the light across the relevant light efficiency of the transmissivity of the first coating.
Fig. 5 show the sectional view of organic light emitting display according to a second embodiment of the present invention.
Fig. 6 show the sectional view of organic light emitting display according to a third embodiment of the present invention.
Fig. 7 show the diffusivity for the light being scattered by scattering particles and the picture quality of organic light emitting display
The analog result of relationship between (fuzziness).
Fig. 8 show the sectional view of conventional organic luminescence display.
Fig. 9 show the analog result of the relationship between the angle of emergence and luminous intensity.
Figure 10 show the Refractive Index of Material of the second substrate and the second base that conventional organic luminescence display is passed through for light
The analog result of relationship between the light loss of the transmissivity of plate.
Specific embodiment
Term " incidence angle " herein refers to the angle between the normal at interface and the direction of incident light that light is entered,
Term " angle of emergence " refers to the angle between the normal of exit boundary interface of light and the direction of emergent light.Therefore, compared to incidence angle
Biggish light, the lesser light of incidence angle enter the interface with the direction for being approximately perpendicular to interface.Compared to the biggish light of the angle of emergence,
The lesser light of the angle of emergence projects the interface to be approximately perpendicular to the direction at interface.
Fig. 1 show the sectional view of OLED display 100 according to first embodiment.OLED display 100 includes organic
It light emitting diode (organic light emitting diode, OLED) display unit 110 and is set on the OLED cell
The first coating 120, the first coating 120 includes first foundation polymer 122 and interspersing among in first foundation polymer 122
Scattering particles 121.
OLED display unit 110 includes: first substrate 111, the first electrode layer being set on first substrate 111 112, sets
It the organic luminous layer 113 that is placed in first electrode layer 112, the second electrode lay 114 being set on organic luminous layer 113 and sets
The second substrate 115 being placed on the second electrode lay 114.The second electrode lay 114 can be, for example, by tin indium oxide (indium-
Tin-oxide, ITO) etc. have radioparent conductive material made of anode.The material of the second substrate 115 can be, for example,
Glass and plastic material etc. have radioparent material.The Refractive Index of Material of the second electrode lay 114 can be lower than organic luminous layer 113
Refractive Index of Material, the Refractive Index of Material of the second substrate 115 can be lower than the Refractive Index of Material of the second substrate layer 114.
First coating 120 is set in the second substrate 115 of OLED display unit 110, first foundation polymer 122
Refractive index is higher than the Refractive Index of Material of the second substrate 115.The Refractive Index of Material of scattering particles 121 is higher than first foundation polymer
122 refractive index.For example, material of the epoxy resin as first foundation polymer 122 can be used.For example, titanium oxide can be used
With the material of the metal oxides as scattering particles 121 such as aluminium oxide.
In the OLED display 100 with this configuration, according to Snell's law, is incident upon from organic luminous layer 113
The light of two electrode layers 114 reflects on the interface between the second electrode lay 114 and the second substrate 115, thus the angle of emergence becomes larger.So
And since the refractive index of first foundation polymer 122 is higher than the Refractive Index of Material of the second substrate 115, so working as light from the second base
When plate 115 enters the first coating 120 comprising first foundation polymer 122, the angle of emergence becomes smaller.Therefore, the second substrate 115 with
Total reflection on interface between first coating 120 is reduced, so as to reduce light loss.In the second substrate 115 and first
On interface between coating 120, Snell's law is described by following equation:
n1Sinθ1=n2Sinθ2
Wherein, n1And n2The respectively refractive index of the second substrate 115 and the first coating 120, θ1It is the second substrate 115
Incidence angle, θ2It is the angle of emergence of the first coating.Due to n2Greater than n1, so from the equations above, θ2Become smaller than θ1。θ2It is larger
So that total reflection is reduced.However, working as light from the first coating 120 including first foundation polymer 122 with a high refractive index
When into the low air of refractive index, still it may be totally reflected on the interface between the first coating 120 and air.This
Outside, Fresnel reflection may occur on interface, as described above.Therefore, when light passes through the first coating 120, it may occur however that
Light loss.
In order to reduce this light loss, the first coating 120 includes scattering particles 121.Into the light of the first coating 120
It is scattered by scattering particles 121.Since the Refractive Index of Material of scattering particles 121 is higher than the folding of first foundation polymer 122
Rate is penetrated, so most of light by scattering is propagated in following direction: compared to the direction before scattering, in the direction, phase
Become smaller for the incidence angle at the interface between the first coating 120 and air.So between the first coating 120 and air
Total reflection on interface is reduced, to reduce light loss.Therefore, compared to traditional OLED displays, according to first embodiment
The light efficiency of OLED display 100 can be improved.
Fig. 2, which is shown, to be shown the refractive index of the first foundation polymer 122 that the first coating 120 includes and passes through with for light
The analog result figure of relationship between the light efficiency of the transmissivity of first coating 120.As shown in Fig. 2, as first foundation is poly-
The refractive index for closing object 122 becomes larger, and the rate that light passes through the first coating 120 also becomes larger, therefore light efficiency improves.
Fig. 3 show show the diffusivity of the light being scattered by the scattering particles 121 that the first coating 120 includes with
For the analog result figure of relationship of the light across the light efficiency of the transmissivity of the first coating 120.As shown in figure 3, with
The diffusivity for the light being scattered by scattering particles 121 becomes larger, and the rate that light passes through the first coating 120 also becomes larger, therefore
Light efficiency becomes larger.
Fig. 4 show the diffusivity for showing the light being scattered by scattering particles and the first coating 120 is directed to by rolling over
Penetrate the analog result figure of the relationship between the transmissivity of first foundation polymer 122 made of the different material of rate.Such as Fig. 4
Shown, as the refractive index of first foundation polymer 122 is got higher, the rate that light passes through the first coating 120 is also become larger, therefore light
Efficiency improves.Diffusivity with the light being scattered by scattering particles 121 becomes larger, and light passes through the speed of the first coating 120
Rate also becomes larger, therefore light efficiency improves.When refractive index is greater than 1, the light loss as caused by Fresnel reflection effect causes to expand
Light efficiency is negative value when scattered rate is zero.Therefore, the refractive index of first foundation polymer is only improved without that can lead using scattering particles
Cause light efficiency decline.However, due to including to dissipate in the first coating 120 of OLED display 100 according to first embodiment
Radion 121 and improve light diffusivity, dissipated according to what the refractive index of first foundation polymer 122 and scattering particles 121 carried out
Relationship between penetrating, when refractive index is got higher, light efficiency is also improved.
A kind of method for manufacturing the OLED display 100 with above-mentioned configuration according to first embodiment is as follows:
In the first step, OLED display unit 110 is provided, OLED display unit 110 includes: first substrate 111, setting
In on first substrate 111 first electrode layer 112, be set in first electrode layer 112 organic luminous layer 113, be set to
The second electrode lay 114 on machine luminescent layer 113 and the second substrate 115 being set on the second electrode lay 114.The second electrode lay
114 Refractive Index of Material is lower than the Refractive Index of Material of organic luminous layer 113.The Refractive Index of Material of the second substrate 115 is lower than second
The Refractive Index of Material of electrode layer 114.
In the second step, the first foundation polymer 122 comprising scattering particles 121 is coated on second with predetermined thickness
On substrate 115.The coating of first foundation polymer 122 can pass through the tradition sides such as rotary coating, slot coated, spraying and wire mark
Method carries out.The refractive index of first foundation polymer 122 is higher than the Refractive Index of Material of the second substrate 115.The material of scattering particles 121
Refractive index is higher than the refractive index of first foundation polymer 122.
In third step, the first coating 120 is formed by solidification first foundation polymer 122, to obtain
OLED display 100.The solidification of first foundation polymer 122 can be carried out by the conventional methods such as heat cure and UV solidification.
It is this that the first coating comprising the scattering particles for reducing light loss is set to the of OLED display unit
Configuration on two substrates is known as " externally embedded type configuration ".In the first and second substrate package first electrode layers, organic luminous layer and
After two electrode layers, the first coating of the OLED display unit with externally embedded type configuration be can be set in the second substrate.?
In this case, since the environment for forming the first coating is not necessarily to as forming first electrode layer, organic luminous layer and second electrode
High cleaning as environment needed for layer, so the first coating in high cleaning room without forming.Therefore, first is formed to cover
The process of cap rock is simple and at low cost.Since the first coating is formed after OLED display unit formation, so the first covering
Layer is not in contact with the hot substance and chemical substance applied during forming OLED display unit.Therefore, the first covering is constituted
The first foundation polymer need not have heat resistance and chemical durability of layer.In addition, the first coating can be easily applied
To existing OLED display unit.Instead of applying the first coating, separately fabricated there can be refraction similar with the first coating
The film of characteristic and scattering properties is simultaneously laminated in the second substrate.But the problem of this manufacturing method be it is at high cost and
There is dust pollution in lamination process, and in general than applying thickness.First foundation polymer is coated to form first
Coating can to avoid such issues that.
On the other hand, in the OLED display with the embedded configuration of tradition, first coating etc. is for improving light efficiency
The component of rate must be formed in OLED display unit.It must be in cleaning for improving the process of the component of light efficiency due to being formed
It is carried out in the clean environments such as room, so the process becomes more sophisticated and manufacturing cost increases.
Fig. 5 show the sectional view of OLED display 200 according to the second embodiment.With OLED according to first embodiment
Display 100 is similar, and OLED display 200 includes OLED display unit 210 and the first coating 220.OLED display unit 210
It include: first substrate 211, first electrode layer 212, organic luminous layer 213, second electrode 214 and the second substrate 215.First
Coating 220 is set in the second substrate 215, and including first foundation polymer 222 and scattering particles 221.First foundation
The refractive index of polymer 222 is higher than the Refractive Index of Material of the second substrate 215.The Refractive Index of Material of scattering particles 221 is higher than first
The refractive index of base polymer 222.Concave-convex pattern 223 is formed on the surface of the first coating 220.
In the OLED display 200 with this configuration, according to Snell's law, launch from organic luminous layer 213
And it is rolled on the interface the second substrate 215 and the first coating 220 across the light of second electrode 214 and the second substrate 215
It penetrates, thus the angle of emergence becomes smaller.Light into the first coating 220 is scattered by scattering particles 221.Due to scattering particles
221 Refractive Index of Material is higher than the Refractive Index of Material of first foundation polymer 222, so most of light by scattering is as follows
Propagate in direction: in the direction, the incidence angle on the surface relative to the first coating 220 is less than the incidence angle before scattering.
The light on 220 surface of the first coating is reached by the concave-convex pattern 223 on the surface of the first coating 220 in the side that the angle of emergence becomes smaller
To middle scattering.In other words, there are two types of backscatter modes for the first coating 220 tool of second embodiment: one is pass through scattering particles
The 221 scattering-in modes carried out, another kind are the surface scattering modes carried out by the concave-convex pattern 223 on surface.By dissipating
The scattering-in mode that radion 221 carries out changes the direction of light to reduce on the interface between the first coating 220 and air
Total reflection, to reduce light loss.Surface scattering mode improves light perpendicular to the interface between the first coating 220 and air
Ratio, to improve brightness.Therefore, compared to traditional OLED displays, OLED display 200 according to the second embodiment
Light efficiency increases.
Fig. 6 show the sectional view of OLED display 300 according to the third embodiment.With OLED according to the second embodiment
Display 200 is similar, and OLED display 300 includes OLED display unit 310 and the first coating 320.According to third embodiment
OLED display 300 further include the second coating 330 on the first coating 320.OLED display unit 310 includes: first
Substrate 311, first electrode layer 312, organic luminous layer 313, the second electrode lay 314 and the second substrate 315.First coating
320 are set in the second substrate 315, and including first foundation polymer 322 and scattering particles 321.First foundation polymer
322 refractive index is higher than the Refractive Index of Material of the second substrate 315.The Refractive Index of Material of scattering particles 321 is poly- higher than first foundation
Close the refractive index of object 322.Concave-convex pattern 323 is formed on the surface of the first coating 320.Second coating 330 is set to first
On coating 320, and including the second base polymer 332.The refractive index of second base polymer 332 is poly- lower than first foundation
Close the refractive index of object 322.
In the OLED display 300 according to the third embodiment with this configuration, according to Snell's law, from organic
Luminescent layer 313 is launched and passes through the light of the second electrode lay 314 and the second substrate 315 in the second substrate 315 and the first coating
It is reflected on interface between 320, thus the angle of emergence becomes smaller.Into the first coating 320 light by scattering particles 321 carry out it is scattered
It penetrates.Since the Refractive Index of Material of scattering particles 321 is higher than the Refractive Index of Material of first foundation polymer 322, so most of warp
The light for crossing scattering is propagated in following direction: in the direction, the incidence angle on the surface relative to the first coating 320, which is less than, to be dissipated
Incidence angle before penetrating.It reaches the light on the surface of the first coating 320 and passes through the concave-convex pattern on the surface of the first coating 320
323 scatter in the direction that the angle of emergence becomes smaller.
In the step of forming the first coating 320, it can be formed by conventional methods such as scratch and nano impressions recessed
Convex pattern 323.In an alternative exemplary, material or process can choose, so that concave-convex pattern 323 is in the first coating
320 itself materials are formed when being solidified.This bumps pattern is self-assembling formation, because of the shrinking percentage of scattering particles 321
Different from forming the shrinking percentage of the first foundation polymer 322 of the first coating, or because if first foundation polymer
322 viscosity is lower, then when the first coating 320 is as film formation, the shape of scattering particles 321 appears in the first coating
320 surface.
In OLED display 200 according to the second embodiment, since the first foundation that the first coating 220 includes polymerize
The refractive index of object 222 is higher than air refraction, so light reflects on the interface between the first coating 220 and air, therefore
The angle of emergence becomes larger.On the other hand, in OLED display 300 according to the third embodiment, the second coating 330 is set to first
On coating 320.The refractive index for the second base polymer 332 for including due to the second coating 330 is lower than the first coating packet
The refractive index of the first foundation polymer 322 contained but be higher than air refraction, so the first coating 320 and the second coating
The light angle of emergence on interface between 330 is less than the first coating 220 and sky of OLED display 200 according to the second embodiment
The light angle of emergence on interface between gas.So being all-trans on interface between the first coating 320 and the second coating 330
Penetrating can be reduced, so as to reduce light loss.Therefore, compared to traditional OLED displays, OLED according to the third embodiment
The light efficiency of display 300 increases.
The second coating 330, which is arranged, may also reduce first without forming concave-convex pattern on the surface of the first coating 320
The total reflection on interface between coating 320 and the second coating 330 simultaneously reduces light loss.Therefore, compared to traditional OLED
The light efficiency of display, OLED display 300 increases.
Second coating 330 can be formed in the following manner: by rotary coating, slot coated, spraying and wire mark etc.
Conventional method coats the second base polymer, then passes through the heat cure similar with the first coating 320 and UV solidification etc. and passes
System method solidifies the second base polymer.
Fig. 7 is shown due to caused by the concave-convex pattern of scattering particles and the first cover surface in the first coating
The analog result figure of relationship between the diffusivity of light and the fuzziness for passing through the image of OLED display acquisition.As discussed above
It states, the light scattering carried out by scattering particles and the concave-convex pattern on surface improves the light efficiency of OLED display.However, as schemed
Shown in 7, as diffusivity becomes larger, the fuzziness of image obtained is also become larger.The fuzziness of image is larger to lead to picture quality
Decline.Diffusivity is determined by such as changing the acceleration of concentration of scattering particle of the first coating.Since acceleration of concentration of scattering particle is lower, so
Diffusivity is smaller, therefore the improvement effect of light efficiency is smaller.However, gathering since acceleration of concentration of scattering particle height will lead to scattering particles
Collection, it is possible that the problems such as generating dispersion effect and image quality decrease.Therefore, in OLED display, it must be determined that first
The concave-convex pattern of acceleration of concentration of scattering particle and the first cover surface in coating, so that the quality and light efficiency of obtained image
All in preferred scope.
It should be noted that above-described embodiment is only used for description technical solution of the invention, it is not intended to limit the invention.Though
So the present invention is described in detail in conjunction with previous embodiment, although it will be understood by those skilled in the art that they still can be to aforementioned
The technical solution recorded in embodiment modifies or carries out equivalence replacement to some or all technical characteristics.
Claims (7)
1. a kind of organic light emitting display with externally embedded type configuration characterized by comprising
Organic Light Emitting Diode unit；And
The first coating being set on the Organic Light Emitting Diode unit, first coating include first foundation polymerization
Object and the scattering particles in the first foundation polymer is interspersed among,
Wherein, the Organic Light Emitting Diode unit includes:
First substrate；
The first electrode layer being set on the first substrate；
The organic luminous layer being set in the first electrode layer；
The second electrode lay being set on the organic luminous layer；And
The second substrate being set on the second electrode lay,
Wherein, first coating is set in the second substrate,
The refractive index of the first foundation polymer is higher than the Refractive Index of Material of the second substrate, and
The Refractive Index of Material of the scattering particles is higher than the refractive index of the first foundation polymer.
2. organic light emitting display according to claim 1, which is characterized in that first coating with described second
The surface for the opposing surfaces that substrate is contacted is concave-convex.
3. organic light emitting display according to claim 1 or 2, which is characterized in that it further include the second coating, described
Two coatings are set on the surface for the opposing surfaces of first coating contacted with the second substrate, and described second
Coating includes the second base polymer,
Wherein, the refractive index of second base polymer is lower than the refractive index of the first foundation polymer.
4. organic light emitting display according to claim 3, which is characterized in that second coating with described first
The surface for the opposing surfaces that coating is contacted is concave-convex.
5. a kind of method that manufacture has the organic light emitting display of externally embedded type configuration characterized by comprising
Organic light emitting diode is provided, the Organic Light Emitting Diode unit includes: first substrate, is set to described first
First electrode layer on substrate, is set on the organic luminous layer organic luminous layer being set in the first electrode layer
The second electrode lay and the second substrate that is set on the second electrode lay；
First foundation polymer is coated on the second substrate, and the first foundation polymer includes scattering particles；And
Solidify the first foundation polymer to form the first coating,
Wherein, the refractive index of the first foundation polymer is higher than the Refractive Index of Material of the second substrate, and
The Refractive Index of Material of the scattering particles is higher than the refractive index of the first foundation polymer.
6. according to the method described in claim 5, it is characterized in that, solidifying the first foundation polymer to form described the
In the step of one coating, concave-convex pattern is formed on the surface of first coating.
7. method according to claim 5 or 6, which is characterized in that further include:
The second base polymer is coated on first coating；And
Solidify second base polymer to form the second coating,
Wherein, the refractive index of second base polymer is lower than the refractive index of the first foundation polymer.
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| Application Number | Priority Date | Filing Date | Title |
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| PCT/CN2016/090770 WO2018014271A1 (en) | 2016-07-20 | 2016-07-20 | An organic light emitting display and a method for manufacturing an organic light emitting display |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100155757A1 (en) * | 2008-12-23 | 2010-06-24 | Samsung Mobile Display Co., Ltd. | Organic light emitting diode display |
| CN102620235A (en) * | 2011-12-20 | 2012-08-01 | 友达光电股份有限公司 | Light extraction film and light emitting element using the same |
| CN103715372A (en) * | 2013-12-26 | 2014-04-09 | 京东方科技集团股份有限公司 | Oled display panel and manufacturing method thereof |
| CN103824960A (en) * | 2008-02-27 | 2014-05-28 | 皇家飞利浦电子股份有限公司 | Hidden organic optoelectronic devices with a light scattering layer |
| CN105098097A (en) * | 2015-09-11 | 2015-11-25 | 四川虹视显示技术有限公司 | Package structure and packaging method of flexible OLED (Organic Light Emitting Diode) device |
| CN105190370A (en) * | 2013-04-05 | 2015-12-23 | 三菱丽阳株式会社 | Optical film and surface light emitting body |
| CN105226198A (en) * | 2015-10-13 | 2016-01-06 | 京东方科技集团股份有限公司 | A kind of waterproof transmission increasing flexible OLED devices device and preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090115970A1 (en) * | 2007-11-02 | 2009-05-07 | Jabil Circuit, Inc. | High efficiency compact oled microdisplay projection engine |
| TWI526893B (en) * | 2013-11-05 | 2016-03-21 | 群創光電股份有限公司 | Touch display device |
-
2016
- 2016-07-20 CN CN201680087739.8A patent/CN109844975A/en active Pending
- 2016-07-20 WO PCT/CN2016/090770 patent/WO2018014271A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103824960A (en) * | 2008-02-27 | 2014-05-28 | 皇家飞利浦电子股份有限公司 | Hidden organic optoelectronic devices with a light scattering layer |
| US20100155757A1 (en) * | 2008-12-23 | 2010-06-24 | Samsung Mobile Display Co., Ltd. | Organic light emitting diode display |
| CN102620235A (en) * | 2011-12-20 | 2012-08-01 | 友达光电股份有限公司 | Light extraction film and light emitting element using the same |
| CN105190370A (en) * | 2013-04-05 | 2015-12-23 | 三菱丽阳株式会社 | Optical film and surface light emitting body |
| CN103715372A (en) * | 2013-12-26 | 2014-04-09 | 京东方科技集团股份有限公司 | Oled display panel and manufacturing method thereof |
| CN105098097A (en) * | 2015-09-11 | 2015-11-25 | 四川虹视显示技术有限公司 | Package structure and packaging method of flexible OLED (Organic Light Emitting Diode) device |
| CN105226198A (en) * | 2015-10-13 | 2016-01-06 | 京东方科技集团股份有限公司 | A kind of waterproof transmission increasing flexible OLED devices device and preparation method thereof |
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Application publication date: 20190604 |