CN105489780A - Light filter and organic electroluminescent device employing same - Google Patents
Light filter and organic electroluminescent device employing same Download PDFInfo
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- CN105489780A CN105489780A CN201511028693.6A CN201511028693A CN105489780A CN 105489780 A CN105489780 A CN 105489780A CN 201511028693 A CN201511028693 A CN 201511028693A CN 105489780 A CN105489780 A CN 105489780A
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- filter
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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
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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
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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
-
- 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
- H10K50/854—Arrangements for extracting light from the devices comprising scattering means
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- Optics & Photonics (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The invention provides a light filter, which comprises a substrate and a plurality of scattering objects, wherein the substrate is used for selecting a required radiation band; and the plurality of scattering objects are arranged in the substrate. The light filter creatively integrates a light filtering function and a light scattering function, and is small in thickness, large in size and wide in application range. According to the organic electroluminescent device provided by the invention, the light filter is arranged on a light exit surface of a white-light organic light-emitting diode, so that a colored light can be filtered out; and the light extraction efficiency of the device can also be effectively improved. In a top-emission organic electroluminescent device, relatively uniform light in a spatial solid angle can be obtained in a light scattering manner, so that the viewing angle effect generated by the micro-cavity effect is effectively regulated and controlled; and a wide viewing angle of the device is achieved.
Description
Technical field
The present invention relates to field of organic electroluminescence, be specifically related to a kind of filter and use its organic electroluminescence device.
Background technology
Organic electroluminescence device (English full name OrganicLight-EmittingDevice is called for short OLED) is active illuminating device, has the advantages such as low-power consumption, colour gamut is wide, volume is thinner, is expected to become main flow of future generation illumination and flat panel display.
According to the difference of light from device exit direction, in prior art, organic electroluminescence device is mainly divided into two kinds of different structures: one is end luminescent device, and light penetrates from the first electrode, incides in air after overdrive circuit and substrate; Another kind is top illuminating device, and light penetrates from the second electrode.Along with the development of Display Technique, organic elctroluminescent device many employings active matrix driving mode, for end light emitting organic electroluminescence display device, the open area injection that the light that Organic Light Emitting Diode sends can only be arranged from drive circuit; But, at least comprise two thin-film transistors and a capacitor in the drive circuit of each Organic Light Emitting Diode, greatly reduce the aperture opening ratio of organic elctroluminescent device.Push up light emitting organic electroluminescence display device and then there are not the problems referred to above, receive the concern of researcher gradually.
In the light emitting organic electroluminescence display device of top, the second electrode is exiting surface, the low work function conductive film layer of preferably clear, due to the restriction of prior art, the second electrode is generally metallic diaphragm, cannot reach complete transparent requirement, therefore, the second electrode can only calculate translucent rete; And in order to improve luminous efficiency, the first electrode often adopts catoptric arrangement, therefore, in the light emitting organic electroluminescence display device of top, the first electrode, the second electrode and the organic layer be clipped between the two very easily form Fabry-Perot type microcavity.This just makes under different viewing angles, and colourity and brightness all larger change can occur, thus affect viewing effect.
Summary of the invention
For this reason, to be solved by this invention is that in prior art, microcavity effect is difficult to the problem regulated and controled, provide a kind of can Effective Regulation microcavity effect filter and use its organic electroluminescence device.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows:
A kind of filter of the present invention, the some scattering objects comprising the substrate for choosing required radiation wave band and arrange in the substrate.
The ratio that size and the described substrate of described scattering object leach radiation wavelength is 4:5 ~ 6:5.
The doping of described scattering object in described substrate is the 0.1wt% ~ 10wt% of described substrate quality.
The size of described scattering object and the thickness ratio of described substrate are 0.09 ~ 0.2.
Described scattering object is at least one in spherical, elliposoidal, fusiformis.
Described scattering object is at least one in silicon dioxide and colloid thereof, calcium oxide, titanium dioxide, zirconium dioxide, indium tin oxide, arsenic trioxide, aluminium oxide, polymethyl methacrylate.
A kind of organic electroluminescence device of the present invention, includes OLED; Also comprise the stacked described filter be arranged on described Organic Light Emitting Diode exiting surface; Described Organic Light Emitting Diode is white organic LED.
Preferably, described filter comprises at least one in ruddiness filter, blue filter, green glow filter, gold-tinted filter.
More preferably, in described ruddiness filter, described scattering object is of a size of 484nm ~ 780nm; In described blue filter, described scattering object is of a size of 360nm ~ 576nm; In described green glow filter, described scattering object is of a size of 400nm ~ 672nm.
Described a kind of organic electroluminescence device, also comprises thin-film transistor, and described thin-film transistor is arranged on the side away from described Organic Light Emitting Diode exiting surface.
Technique scheme of the present invention has the following advantages compared to existing technology:
1, the filter described in the embodiment of the present invention, the some scattering objects comprising the substrate for choosing required radiation wave band and arrange in the substrate.Creatively filtering functions and light scattering function are integrated in one, thickness is thin, size is large, has wide range of applications.
2, the organic electroluminescence device described in the embodiment of the present invention, the exiting surface of white organic LED is provided with described filter, not only can leach coloured light, effectively can also improve the light extraction efficiency of device.In top radiation organic EL part, light scattering can also be utilized to obtain more uniform light in space multistory angle, and the angle effects produced with this Effective Regulation microcavity effect, realizes the wide viewing angle of device.
Accompanying drawing explanation
In order to make content of the present invention be more likely to be clearly understood, below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the structural representation of filter described in the embodiment of the present invention 1;
Fig. 2 is the structural representation of organic electroluminescence device described in the embodiment of the present invention 1;
In figure, Reference numeral is expressed as: 1-Organic Light Emitting Diode, 2-filter, 21-substrate, 22-scattering object.
Embodiment
In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiments of the present invention are described in further detail.
The present invention can implement in many different forms, and should not be understood to be limited to embodiment set forth herein.On the contrary, provide these embodiments, make the disclosure to be thorough and complete, and design of the present invention fully will be conveyed to those skilled in the art, the present invention will only be limited by claim.In the accompanying drawings, for clarity, the size in layer and region and relative size can be exaggerated.Should be understood that, when element such as layer, region or substrate be referred to as " being formed in " or " being arranged on " another element " on " time, this element can be set directly on another element described, or also can there is intermediary element.On the contrary, when element is referred to as on " being formed directly into " or " being set directly at " another element, there is not intermediary element.
Embodiment 1
The present embodiment provides a kind of filter, as shown in Figure 1, and the some scattering objects 22 comprising the substrate 21 for choosing required radiation wave band and be arranged in substrate 21.
As one embodiment of the present of invention, in the present embodiment, the thickness of substrate 21 is 4 μm, and leaching wavelength is 620nm, is ruddiness; Scattering object 22 is preparing spherical SiO 2 particles, and particle diameter is 630nm.The doping of scattering object 22 in substrate 21 is the 0.5wt% of described substrate 21 quality.
As convertible embodiment of the present invention; the size of scattering object 22 is not limited thereto, its size range and substrate 21 to leach radiation wave band identical, and be 0.12 ~ 0.2 with the thickness ratio of substrate 21; all can realize object of the present invention, belong to protection scope of the present invention.
As convertible embodiment of the present invention, the shape of scattering object 22 is selected from but at least one in being not limited to spherical, elliposoidal, fusiformis; Scattering object 22 is selected from but is not limited at least one in the material such as silicon dioxide and colloid, calcium oxide, titanium dioxide, zirconium dioxide, indium tin oxide, arsenic trioxide, aluminium oxide, polymethyl methacrylate; all can realize object of the present invention, belong to protection scope of the present invention.
The present embodiment also provides a kind of organic electroluminescence device, as shown in Figure 2, includes OLED 1 and the stacked filter 2 be arranged on described white organic LED exiting surface.
As one embodiment of the present of invention, in the present embodiment, Organic Light Emitting Diode 1 is white organic LED.
As one embodiment of the present of invention, organic electroluminescence device also comprises thin-film transistor, and described thin-film transistor is arranged on the side away from described Organic Light Emitting Diode 1 exiting surface, and namely described organic electroluminescence device is top emitting device.The device architecture of described white organic LED is: Al (150nm)/ITO (400nm)/NPB (145nm)/DPVPA (8nm): DSA-ph (3%)/Alq
3(22nm): rubrene (3%)/Alq
3(30nm)/Mg:(2nm): Ag (100%)/Ag (15nm), chromaticity coordinates is (0.31,0.32).Obtain more uniform light in space multistory angle by the light scattering of filter 2, with this Effective Regulation microcavity effect, realize the wide viewing angle of organic electroluminescence device.
Embodiment 2
The present embodiment provides a kind of filter, the some scattering objects comprising the substrate for choosing required radiation wave band and arrange in the substrate.
As one embodiment of the present of invention, in the present embodiment, the thickness of substrate is 4 μm, and leaching wavelength is 522nm, is green glow; Scattering object is the TiO 2 particles of fusiformis, and major axis dimension is 530nm.Scattering object doping is in the substrate the 0.3wt% of described substrate quality.
As convertible embodiment of the present invention, the size of scattering object is not limited thereto, its size range and substrate to leach radiation wave band identical, and be 0.1 ~ 0.168 with the thickness ratio of substrate, all can realize object of the present invention, belong to protection scope of the present invention.
The present embodiment also provides a kind of organic electroluminescence device, and device architecture, with embodiment 1, includes OLED 1 and the stacked filter 2 be arranged on described white organic LED exiting surface.
Embodiment 3
The present embodiment provides a kind of filter, the some scattering objects comprising the substrate for choosing required radiation wave band and arrange in the substrate.
As one embodiment of the present of invention, in the present embodiment, the thickness of substrate is 4 μm, and leaching wavelength is 458nm, is blue light; Scattering object is the polymethyl methacrylate particle of fusiformis, and major axis dimension is 0.5 μm.Scattering object doping is in the substrate the 0.2wt% of described substrate quality.
As convertible embodiment of the present invention, the size of scattering object is not limited thereto, its size range and substrate to leach radiation wave band identical, and be 0.09 ~ 0.144 with the thickness ratio of substrate, all can realize object of the present invention, belong to protection scope of the present invention.
The present embodiment also provides a kind of organic electroluminescence device, and device architecture, with embodiment 1, includes OLED 1 and the stacked filter 2 be arranged on described white organic LED exiting surface.
Comparative example 1
The present embodiment provides a kind of organic electroluminescence device, concrete structure and preparation method with embodiment 1, uniquely unlike: filter only comprises substrate.
Comparative example 2
The present embodiment provides a kind of organic electroluminescence device, concrete structure and preparation method with embodiment 2, uniquely unlike: filter only comprises substrate.
Comparative example 3
The present embodiment provides a kind of organic electroluminescence device, concrete structure and preparation method with embodiment 3, uniquely unlike: filter only comprises substrate.
Test case
By PR650 spectrophotometer (purchased from PHOTORESEACH.Inc) to the optical property of the organic electroluminescence device in above-described embodiment and comparative example, test data is as shown in the table:
Known by upper table data, the organic electroluminescence device described in the embodiment of the present invention can utilize the scattering object in described filter to carry out light scattering and obtain more uniform light in space multistory angle, with this Effective Regulation microcavity effect, realizes the wide viewing angle of device.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to execution mode.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all execution modes.And thus the apparent change of extending out or variation be still among protection scope of the present invention.
Claims (10)
1. a filter, is characterized in that, the some scattering objects comprising the substrate for choosing required radiation wave band and arrange in the substrate.
2. filter according to claim 1, is characterized in that, the size of described scattering object is 4:5 ~ 6:5 with the ratio leaching radiation wavelength of described substrate.
3. filter according to claim 1 and 2, is characterized in that, the doping of described scattering object in described substrate is the 0.1wt% ~ 10wt% of described substrate quality.
4. the filter according to any one of claim 1-3, is characterized in that, the size of described scattering object and the thickness ratio of described substrate are 0.09 ~ 0.2.
5. the filter according to any one of claim 1-4, is characterized in that, described scattering object is at least one in spherical, elliposoidal, fusiformis.
6. the filter according to any one of claim 1-5, it is characterized in that, described scattering object is at least one in silicon dioxide and colloid thereof, calcium oxide, titanium dioxide, zirconium dioxide, indium tin oxide, arsenic trioxide, aluminium oxide, polymethyl methacrylate.
7. an organic electroluminescence device, includes OLED; It is characterized in that, also comprise the stacked filter as described in any one of right 1-6 be arranged on described Organic Light Emitting Diode exiting surface; Described Organic Light Emitting Diode is white organic LED.
8. organic electroluminescence device according to claim 7, is characterized in that, described filter comprises at least one in ruddiness filter, blue filter, green glow filter, gold-tinted filter.
9. organic electroluminescence device according to claim 8, is characterized in that, in described ruddiness filter, described scattering object is of a size of 480nm ~ 780nm; In described blue filter, described scattering object is of a size of 360nm ~ 576nm; In described green glow filter, described scattering object is of a size of 400nm ~ 672nm.
10. the organic electroluminescence device according to any one of claim 7-9, is characterized in that, also comprises thin-film transistor, and described thin-film transistor is arranged on the side away from described Organic Light Emitting Diode exiting surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511028693.6A CN105489780A (en) | 2015-12-31 | 2015-12-31 | Light filter and organic electroluminescent device employing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511028693.6A CN105489780A (en) | 2015-12-31 | 2015-12-31 | Light filter and organic electroluminescent device employing same |
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| Publication Number | Publication Date |
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| CN105489780A true CN105489780A (en) | 2016-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201511028693.6A Pending CN105489780A (en) | 2015-12-31 | 2015-12-31 | Light filter and organic electroluminescent device employing same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107706306A (en) * | 2017-10-26 | 2018-02-16 | 京东方科技集团股份有限公司 | A kind of organic light-emitting diode display substrate and preparation method thereof, display device |
| CN109690808A (en) * | 2018-12-05 | 2019-04-26 | 京东方科技集团股份有限公司 | Light emitting diode and its manufacturing method, display base plate and display panel |
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| CN102593370A (en) * | 2011-11-23 | 2012-07-18 | 友达光电股份有限公司 | Light emitting element |
| CN103917000A (en) * | 2013-01-07 | 2014-07-09 | 群康科技(深圳)有限公司 | Patterning color conversion film and display device applying same |
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Patent Citations (5)
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|---|---|---|---|---|
| JP2001330822A (en) * | 2000-03-14 | 2001-11-30 | Seiko Epson Corp | Liquid crystal display device and electronic equipment |
| CN1498046A (en) * | 2002-10-01 | 2004-05-19 | ��˹���´﹫˾ | Organic luminescent device with enhanced light extraction efficiency |
| CN102326101A (en) * | 2009-02-20 | 2012-01-18 | 富士胶片株式会社 | Optical member, and organic electroluminescence display device provided with optical member |
| CN102593370A (en) * | 2011-11-23 | 2012-07-18 | 友达光电股份有限公司 | Light emitting element |
| CN103917000A (en) * | 2013-01-07 | 2014-07-09 | 群康科技(深圳)有限公司 | Patterning color conversion film and display device applying same |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107706306A (en) * | 2017-10-26 | 2018-02-16 | 京东方科技集团股份有限公司 | A kind of organic light-emitting diode display substrate and preparation method thereof, display device |
| CN107706306B (en) * | 2017-10-26 | 2020-02-04 | 京东方科技集团股份有限公司 | Organic light emitting diode display substrate, manufacturing method thereof and display device |
| US10573847B2 (en) | 2017-10-26 | 2020-02-25 | Boe Technology Group Co., Ltd. | Display substrate, manufacturing method thereof, and display device |
| CN109690808A (en) * | 2018-12-05 | 2019-04-26 | 京东方科技集团股份有限公司 | Light emitting diode and its manufacturing method, display base plate and display panel |
| US11315982B2 (en) | 2018-12-05 | 2022-04-26 | Boe Technology Group Co., Ltd. | Light emitting diode with a patterned scattering layer and fabrication method thereof, display substrate and display panel |
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Application publication date: 20160413 |