CN1937873A - Light-emitting device and its panel - Google Patents
Light-emitting device and its panel Download PDFInfo
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- CN1937873A CN1937873A CN 200510104966 CN200510104966A CN1937873A CN 1937873 A CN1937873 A CN 1937873A CN 200510104966 CN200510104966 CN 200510104966 CN 200510104966 A CN200510104966 A CN 200510104966A CN 1937873 A CN1937873 A CN 1937873A
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Abstract
A luminous device includes a substrate, a display area and at least one reflecting lamination layer. In which the display area has at least one luminous component in the substrate; at least one part of the reflecting lamination layer is set in the edge of the display area for reflecting the rays emitted form the luminous components to improve the external quantum efficiency.
Description
Technical field
The invention relates to a kind of light-emitting device and its panel, especially in regard to light-emitting device and its panel of the high external quantum efficiency of a kind of tool.
Background technology
Light-emitting device, organic light emitting apparatus (organic electroluminescentapparatus) particularly, because the fast development of technology, marched toward the practical stage, because of it has self-luminous, the restriction of no visual angle, power saving, processing procedure is simple and easy, low-cost, operating temperature range is wide, the advantage of high answer speed and full-colorization or the like, make it have great potentiality, be expected to become the main flow of flat-panel screens of future generation.
The organic illuminating element of organic light emitting apparatus is the device that a kind of self-luminous characteristic of utilizing organic functional material (organicfunctional materials) reaches display effect, it can be divided into micromolecule organic illuminating element (small moleculeOLED according to the molecular weight difference of organic functional material, SM-OLED) with macromolecule organic illuminating element (polymer light-emittingdevice, PLED) two big classes; Please refer to shown in Figure 1, existing known organic illuminating element 1, it is to comprise a substrate 11, an anode 12, an organic functional layer 13 and a negative electrode 14, but and anode 12 and the position of negative electrode 14 are double replacements mutually.
When organic illuminating element 1 is imposed direct current, electric current is by between anode 12 and the negative electrode 14, when making electric hole and electronics in organic functional layer 13, produce exciton in conjunction with (recombination) again, just can make organic functional layer 13 according to its properties of materials, and produce the mechanism of giving out light of different colours, and send by a viewing area.
Yet, for organic illuminating element 1, because after light produces in organic functional layer 13 is to distribute equably towards any direction, again, the refractive index of organic illuminating element 1 each component units is neither together, therefore light is after organic functional layer 13 output, part light can be sent by the viewing area, total reflection may take place and be limited in internal structure in part light, more some light may distribute via the element side, in sum, calculates with theoretical value, only have 20% light can spread out of element-external approximately, and all the other light of 80% all can't effectively utilize.
Therefore for solving the problem of said external luminous efficiency, many researchs are arranged can promote organic illuminating element external quantum efficiency (External Quantum Efficiency, EQE) be purpose, promote the luminous efficiency of organic illuminating element, comprising several methods are arranged: one, for going out specific structure at the organic illuminating element surface etching, method is for to be coated with the polystyrene (polystyrene) that an individual layer diameter is 0.2 μ m prior to light-emitting area, etch the special construction that a degree of depth is 0.17 μ m with the method for dry-etching at light-emitting area more afterwards, show that by Theoretical Calculation gained result its external quantum efficiency can be increased to 57.69% by 27.06%; Its two, for attaching convex lens on the face of the viewing area of organic illuminating element, this can make external quantum efficiency increase by 1.5 times.
As mentioned above, method by existing known improvement organic illuminating element external quantum efficiency shows, even the most effective method for improving, still 40% the light of having an appointment can't be derived from the viewing area of organic light emitting apparatus, therefore, how can effectively promote the luminous efficiency of light-emitting device, be one of important topic for current light-emitting device in fact.
Summary of the invention
Because above-mentioned problem, light-emitting device and its panel of purpose of the present invention for a kind of effective lifting external quantum efficiency is provided.
Edge this, for reaching above-mentioned purpose, be to comprise a substrate, a viewing area and at least one reflection lamination according to a kind of light-emitting device of the present invention.Wherein, the viewing area has at least one light-emitting component and is arranged on the substrate; The part that has at least of reflection lamination is the edge that is arranged at the viewing area.
For reaching above-mentioned purpose, be to comprise a substrate, a viewing area and at least one reflection lamination according to a kind of luminescent panel of the present invention.Wherein, the viewing area has plural light-emitting component and is arranged on the substrate; The part that has at least of reflection lamination is to be arranged at crack between the light-emitting component.
From the above, because of according to light-emitting device of the present invention being utilizes at least one part of at least one reflection lamination to be arranged at crack between the edge of viewing area or the light-emitting component, because the reflection lamination is by high refractive index layer and mutual stacked formation of antiradar reflectivity layer, therefore can be in order to reflect the light that selfluminous device (for example organic light emitting apparatus) is sent, and effectively promote external quantum efficiency, more can be applied on display unit, light source or the backlight simultaneously with it in conjunction with ultra-thin device construction.
Description of drawings
Fig. 1 is the schematic diagram of existing known organic illuminating element and luminous consume thereof.
Fig. 2 A～2C is the schematic diagram according to the light-emitting device of preferred embodiment of the present invention.
Fig. 3 is the schematic diagram according to the organic light emitting apparatus of preferred embodiment of the present invention.
Fig. 4 A～4C is the schematic diagram according to the luminescent panel of another preferred embodiment of the present invention.
Fig. 5 is the schematic diagram according to the organic luminous panel of another preferred embodiment of the present invention.
1: organic illuminating element
11: substrate 12: anode
13: organic functional layer 14: negative electrode
2: light-emitting device 21: substrate
22: viewing area 221: light-emitting component
Electrode 223 in 222: the first: the organic functional layer
Electrode 23 in 224: the second: the reflection lamination
231: antiradar reflectivity layer 232: high refractive index layer
24: barrier layer 3: luminescent panel
31: substrate 32: viewing area
321: 322: the first electrodes of light-emitting component
323: 324: the second electrode of organic functional layer
33: reflection lamination 331: antiradar reflectivity layer
332: high refractive index layer 34: barrier layer
Embodiment
Hereinafter with reference to correlative type, light-emitting device and its panel according to preferred embodiment of the present invention are described, wherein components identical will be illustrated with identical reference marks.
Please refer to shown in Fig. 2 A, is to comprise a substrate 21, a viewing area 22 and at least one reflection lamination 23 according to a kind of light-emitting device 2 of preferred embodiment of the present invention.
From the above, viewing area 22 is formed by at least one light-emitting component 221, in the present embodiment, one light-emitting component 221 is corresponding to viewing area 22, certainly, also can constitute viewing area 22 by a plurality of light-emitting components 221, at this moment, reflection lamination 23 be can a continuous strip or discontinuous strip-like-shaped be formed on the substrate 21, and be arranged at the both sides of viewing area 22 or all around with its at least one part, again, have at least part reflection lamination 23 to be arranged at the edge of light-emitting component 221, the light that is sent by light-emitting component 221 in order to reflection, and the display surface (shown in the arrow among Fig. 2 A) of guiding viewing area 22 is concentrated and is penetrated.
Shown in Fig. 2 B and Fig. 2 C, light-emitting device 2 according to preferred embodiment of the present invention more comprises at least one barrier layer 24, and it is the edge that is formed at light-emitting component 221, in order to define viewing area 22, wherein, the section shape of barrier layer 24 can be also trapezoidal or fall trapezoidal aspect; At this moment, reflection lamination 23 is to be arranged at (shown in Fig. 2 B) on the barrier layer 24, or the sidewall (shown in Fig. 2 C) that is arranged at barrier layer 24 is concentrated the purpose that penetrates to reach the light guiding that light-emitting component 221 is sent by the display surface (shown in the arrow among Fig. 2 B) of viewing area 22.Wherein, the material of barrier layer 24 is to can be pi (polyimide) or photoresist.
In the present embodiment, the substrate 21 of light-emitting device 2 be can be selected from rigid substrates, flexible base, board, glass substrate, plastic substrate and silicon substrate at least one of them, and the material of substrate 21 be for the polymethyl methyl esters (Polymethylmethacrylate, PMMA), plastic cement, macromolecule, glass and silicon at least one of them.
From the above, as shown in Figure 3, be arranged at the light-emitting component 221 on the substrate 21, be to can be an organic illuminating element, it is to comprise one first electrode 222, at least one organic functional layer 223 and one second electrode 224 also are arranged on the substrate 21 in regular turn, in the present embodiment, first electrode 222 can be anode, its material is the metal oxide that is selected from conduction, wherein the material of Dao Dian metal oxide is to be selected from tin indium oxide, aluminum zinc oxide, indium zinc oxide and cadmium tin-oxide at least one of them, and be to utilize sputter (sputtering) mode or ion plating (ion plating) mode is formed on the substrate 21.
In addition, organic functional layer 223 generally includes an electric hole implanted layer, an electric hole transfer layer, a luminescent layer, an electron transfer layer and an electron injecting layer (not shown), and organic functional layer 223 is to utilize evaporation (evaporation), rotary coating (spin coating), ink jet printing (ink jetprinting), transfer (trahsfer) or printing modes such as (printing) to be formed on first electrode 222.In addition, the light launched of organic functional layer 223 can be blue light, green glow, ruddiness, white light, other monochromatic light or the colourama of monochromatic combination.
And second electrode 224 can be used as negative electrode, its material be the alloy that is selected from aluminium, calcium, magnesium, indium, tin, manganese, silver, gold and contains magnesium at least one of them, and the alloy that wherein contains magnesium comprises but is not defined as magnesium silver alloy, magnesium indium alloy, magnesium ashbury metal, magnesium antimony alloy and magnesium tellurium alloy that second electrode 224 is to utilize methods such as evaporation or sputter to be formed on the organic functional layer 223.In sum, this one carry be, first electrode 222 also can be used as negative electrode, second electrode 224 is then as anode.
Please refer to shown in Fig. 4 A, according to the luminescent panel 3 of preferred embodiment of the present invention, it is to comprise a substrate 31, a viewing area 32 and at least one reflection lamination 33 again.
Viewing area 32 has plural light-emitting component 321 and is arranged on the substrate 31, at this moment, at least one part of reflection lamination 33 is to be arranged at crack between the light-emitting component 321, as mentioned above, the setting of reflection lamination 33 is that light that is sent by light-emitting component 321 and the display surface (shown in the arrow among Fig. 4 A) that leads viewing area 32 are concentrated to be penetrated in order to reflect.Wherein, reflection lamination 33 is as previously mentioned by antiradar reflectivity layer 331 and mutual stacked being formed on the substrate 31 of the order of high refractive index layer 332.
From the above, shape, material and the setting of reflection lamination 33, and the material of high refractive index layer 332 and antiradar reflectivity layer 331 with light-emitting device 2 all as the aforementioned is set, so repeat no more.
Again, shown in Fig. 4 B and 4C, in the present embodiment, more comprise at least one barrier layer 34, it is to be formed at crack between the light-emitting component 321, to define each light-emitting component 321 zone, wherein, with the section of barrier layer 34, can form trapezoidal or fall trapezoidal form; At this moment, reflection lamination 33 is to be arranged at (shown in Fig. 4 B) on the barrier layer 34, also maybe can be arranged at the sidewall (shown in Fig. 4 C) of barrier layer, to reach the concentrated purpose that penetrates of light that guiding light-emitting component 321 sends.Wherein, the material of barrier layer 34 is to can be pi or photoresist.
From the above, according to the luminescent panel 3 of preferred embodiment of the present invention, as shown in Figure 5, light-emitting component 321 is to comprise one first electrode 322, at least one organic functional layer 323 and one second electrode 324.
In the present embodiment, configuration, material and the manufacture method of substrate 31, first electrode 322, organic functional layer 323 and second electrode 324 are as previously mentioned, so repeat no more.
Comprehensively above-mentioned, according to light-emitting device of the present invention and its panel is to utilize at least one part of at least one reflection lamination to be formed at crack between the edge of viewing area or each light-emitting component, because the reflection lamination is by mutual stacked formation of high/low reflectivity layer, therefore the light that can the usable reflection light-emitting component be sent, and then effectively promote the forward luminous efficiency of light-emitting device, and this light-emitting device can be applied to display unit, light source or backlight.
The above only is an illustrative, but not is restricted person.Anyly do not break away from spirit of the present invention and category, and, all should be included in the scope of claim its equivalent modifications of carrying out or change.
Claims (11)
1, a kind of light-emitting device is characterized in that it comprises:
One substrate;
One viewing area has at least one light-emitting component and is arranged on the substrate; And
At least one reflection lamination is to have at least a part to be arranged at the edge of viewing area.
2, light-emitting device according to claim 1 is characterized in that wherein having at least part reflection lamination to be arranged at the edge of light-emitting component.
3, light-emitting device according to claim 1 is characterized in that wherein said reflection lamination is to comprise at least one high refractive index layer and at least one antiradar reflectivity layer, and high refractive index layer and antiradar reflectivity layer are stacked alternately.
4, light-emitting device according to claim 3, it is characterized in that wherein the material of high refractive index layer be selected from zinc sulphide (ZnS), zinc selenide (ZnSe), cadmium telluride (CdTe) and cadmium selenide (CdSe) at least one of them, the material of antiradar reflectivity layer is to be selected from bifluoride magnesium (MgF
2), tin indium oxide (ITO) and alundum (Al (Al
2O
3) at least one of them.
5, light-emitting device according to claim 1 is characterized in that more comprising:
At least one barrier layer is the edge that is arranged at light-emitting component.
6, light-emitting device according to claim 1, wherein light-emitting component is to be organic illuminating element, and organic illuminating element is to comprise one first electrode, at least one organic functional layer and one second electrode in regular turn.
7, a kind of luminescent panel is characterized in that it comprises:
One substrate;
One viewing area has plural light-emitting component and is arranged on the substrate; And
At least one reflection lamination is to have at least a part to be arranged at crack between the light-emitting component.
8, luminescent panel according to claim 7, it is characterized in that wherein reflecting lamination is to comprise at least one high refractive index layer and at least one antiradar reflectivity layer, and high refractive index layer and antiradar reflectivity layer are stacked alternately.
9, luminescent panel according to claim 8, it is characterized in that wherein the material of high refractive index layer be selected from zinc sulphide (ZnS), zinc selenide (ZnSe), cadmium telluride (CdTe) and cadmium selenide (CdSe) at least one of them, the material of antiradar reflectivity layer is to be selected from bifluoride magnesium (MgF
2), tin indium oxide (ITO) and alundum (Al (Al
2O
3) at least one of them.
10, luminescent panel according to claim 7 is characterized in that more comprising at least one barrier layer, is the edge that is arranged at light-emitting component.
11, luminescent panel according to claim 7 is characterized in that wherein light-emitting component is to be organic illuminating element, and organic illuminating element is to comprise one first electrode, at least one organic functional layer and one second electrode in regular turn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510104966 CN1937873A (en) | 2005-09-22 | 2005-09-22 | Light-emitting device and its panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510104966 CN1937873A (en) | 2005-09-22 | 2005-09-22 | Light-emitting device and its panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1937873A true CN1937873A (en) | 2007-03-28 |
Family
ID=37955057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510104966 Pending CN1937873A (en) | 2005-09-22 | 2005-09-22 | Light-emitting device and its panel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1937873A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104124393A (en) * | 2013-04-24 | 2014-10-29 | 海洋王照明科技股份有限公司 | Organic light-emitting device and preparation method thereof |
-
2005
- 2005-09-22 CN CN 200510104966 patent/CN1937873A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104124393A (en) * | 2013-04-24 | 2014-10-29 | 海洋王照明科技股份有限公司 | Organic light-emitting device and preparation method thereof |
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