CN1921718B - Organic electroluminescent cell - Google Patents
Organic electroluminescent cell Download PDFInfo
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- CN1921718B CN1921718B CN2005100930035A CN200510093003A CN1921718B CN 1921718 B CN1921718 B CN 1921718B CN 2005100930035 A CN2005100930035 A CN 2005100930035A CN 200510093003 A CN200510093003 A CN 200510093003A CN 1921718 B CN1921718 B CN 1921718B
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Abstract
The invention relates to an organic electroluminescent element, which comprises base plate, metal electrode layer, organic lighting layer, transparent electrode layer, passive layer and lens. Wherein, the metal electrode layer is above the base plate; the organic lighting layer is above the metal electrode layer; the transparent electrode layer is above the organic lighting layer; the passive layer is above the transparent electrode layer and the lens is above the passive layer; said lens has opposite bottom and top and several band surfaces connected between the bottom and top to form discontinuous surface; said band surfaces are incline while the band surface near the bottom has large angle with the bottom.
Description
Technical field
The present invention relates to a kind of light-emitting component (luminescence device), and be particularly related to a kind of organic electroluminescent device (organic electroluminescence device).
Background technology
Organic electroluminescent device is the element that a kind of self-luminous characteristic of utilizing organic functions material (organic functionalmaterial) reaches display effect, wherein the molecular weight according to the organic functions material is divided into micromolecule organic electroluminescent device (Small Molecule OELD, SM-OELD) with high molecule electroluminescent element (Polymer Electro-Luminescent Device, PELD) two big classes.Both ray structures are made of pair of electrodes and organic functions material layer.When applying direct voltage, organic functional material layer is injected from anode (anode) in the hole, and electronics injects organic functional material layer from negative electrode (cathode), because the potential difference that extra electric field caused makes two kinds of charge carriers of hole and electronics (carrier) move and produce radiativity compound (radiative recombination) in the organic functions material layer.Part can be excited the organic functions material molecule in conjunction with the energy of being emitted by the electron hole again and form single excite state molecule.When single excite state molecule releases energy when getting back to ground state, wherein a certain proportion of energy can be emitted and luminous in the mode of photon, and this is the principle of luminosity of organic electroluminescent device.
Fig. 1 is a kind of generalized section of known organic electroluminescent device.Please refer to Fig. 1, known organic electroluminescent device 100 is made up of infrabasal plate 110, metal anode 120, organic luminous layer 130, transparent cathode 140 and upper substrate 150.Wherein, metal anode 120 is arranged on the infrabasal plate 110, and organic luminous layer 130 is arranged on the metal anode 120, and transparent cathode 140 is arranged between upper substrate 150 and the organic luminous layer 130.When applying bias voltage and stride across metal anode 120 with transparent cathode 140, electronics can transfer to organic luminous layer 130 by transparent cathode 140.On the other hand, the hole can transfer to organic light emission 130 by metal anode 120.At this moment, (recombination) phenomenon can take place to combine with the hole in electronics again in organic luminous layer 130, and then produces exciton to reach luminous effect.
From the above, though the light 132 that is sent by organic luminous layer 130 is towards penetrating from all directions, but the light 132 towards the below scattering can be reflected by metal anode 120, so known organic electroluminescent device 100 is the top emission type organic electro luminescent element.Yet because the refractive index height of the refractive index ratio air of upper substrate 150, when light 132 during from upper substrate 150 directive air, if incidence angle is greater than the angle of total reflection, light 132 can produce total reflections also produce waveguide phenomenon in upper substrate 150.Therefore, having part light 132 in the light 132 that organic luminous layer 130 is sent can't penetrate from upper substrate 150, thereby influences the luminous efficiency of organic electroluminescent device 100.
Summary of the invention
Purpose of the present invention just provides a kind of organic electroluminescent device of top emission type, and it has higher luminous efficiency.
Another object of the present invention provides a kind of organic electroluminescent device of bottom-emission type, and it has higher luminous efficiency.
The present invention proposes a kind of organic electroluminescent device, and it comprises substrate, metal electrode layer, organic luminous layer, transparent electrode layer, passivation layer and lens.Wherein, metal electrode layer is arranged on the substrate, and organic luminous layer is arranged on the metal electrode layer, and organic luminous layer is suitable for emitting beam.Transparent electrode layer is arranged on the organic luminous layer, and passivation layer is arranged on the transparent electrode layer, and lens are arranged on the passivation layer.In addition, lens have relative end face and bottom surface and be connected in end face and the bottom surface between a plurality of band-like surface, it constitutes noncontinuous surface.These band-like surface are inclined surface, and bigger near the band-like surface and the angle between the bottom surface of bottom surface.Wherein, the profile of organic luminous layer is that the length of side is the square of 2w, the angle of total reflection θ between lens and the air
0=sin
-1(1/n), wherein n is the refractive index of passivation layer and lens, according to tan θ
0=(a+w)/and H, H is the thickness of lens and passivation layer, calculates a=Htan θ
0-w, the Breadth Maximum of end face are 2a, the maximum angle θ between band-like surface and the end face
Ab=tan
-1[H/ (w-a)]+θ
0-90 °, the peak of band-like surface and the maximum b=[H-tan θ of the beeline between the minimum point
b(a+w)]/sin θ
Ab+ tan θ
bCos θ
Ab, and θ
b=90 °-θ
0-θ
Ab, thus, the incidence angle of each point all is less than or equal to angle of total reflection θ on the end face of the light incident lens that organic luminous layer sent and each band-like surface
0
In the above-mentioned organic electroluminescent device, the profile on the composition surface of organic luminous layer and transparent electrode layer for example is a rectangle, and the profile of the end face of lens and bottom surface for example is circular, and the profile in the cross section of each parallel bottom surface of band-like surface for example is circular.
In the above-mentioned organic electroluminescent device, the profile on the composition surface of organic luminous layer and transparent electrode layer for example is a rectangle, and the profile of the end face of lens and bottom surface for example is rectangle, and the profile in the cross section of each parallel bottom surface of band-like surface for example is a rectangle.
In the above-mentioned organic electroluminescent device, the material of lens for example is a transparent material.In addition, transparent material for example be Merlon (polycarbonate, PC) or polymethyl methacrylate (polymethylmethacrylate, PMMA).
Above-mentioned organic electroluminescent device for example also comprises hole transmission layer, is arranged between metal electrode layer and the organic luminous layer.
Above-mentioned organic electroluminescent device for example also comprises electron transfer layer, is arranged between transparent electrode layer and the organic luminous layer.
The present invention proposes a kind of organic electroluminescent device in addition, and it comprises substrate, transparent electrode layer, organic luminous layer, metal electrode layer and lens.Wherein, transparent electrode layer is arranged on the first surface of substrate, and organic luminous layer is arranged on the transparent electrode layer, and organic luminous layer is suitable for emitting beam.Metal electrode layer is arranged on the organic luminous layer, and lens are arranged on the second surface of substrate, and second surface is relative with first surface.In addition, lens have relative end face and bottom surface and be connected in end face and the bottom surface between a plurality of band-like surface.These band-like surface constitute noncontinuous surfaces, and these band-like surface are inclined surface, and bigger near the band-like surface and the angle between this bottom surface of this bottom surface.Wherein, the profile of organic luminous layer is that the length of side is the square of 2w, the angle of total reflection θ between lens and the air
0=sin
-1(1/n), wherein n is the refractive index of passivation layer and lens, according to tan θ
0=(a+w)/and H, H is the thickness of lens and passivation layer, calculates a=Htan θ
0-w, the Breadth Maximum of end face are 2a, the maximum angle θ between band-like surface and the end face
Ab=tan
-1[H/ (w-a)]+θ
0-90 °, the peak of band-like surface and the maximum b=[H-tan θ of the beeline between the minimum point
b(a+w)]/sin θ
Ab+ tan θ
bCos θ
Ab, and θ
b=90 °-θ
0-θ
Ab, thus, the incidence angle of each point all is less than or equal to angle of total reflection θ on the end face of the light incident lens that organic luminous layer sent and each band-like surface
0
In the above-mentioned organic electroluminescent device, the profile on the composition surface of organic luminous layer and transparent electrode layer for example is a rectangle, and the profile of the end face of lens and bottom surface for example is circular, and the profile in the cross section of each parallel bottom surface of band-like surface for example is circular.
In the above-mentioned organic electroluminescent device, the profile on the composition surface of organic luminous layer and transparent electrode layer for example is a rectangle, and the profile of the end face of lens and bottom surface for example is rectangle, and the profile in the cross section of each parallel bottom surface of band-like surface for example is a rectangle.
In the above-mentioned organic electroluminescent device, the material of lens for example is a transparent material.In addition, transparent material for example is Merlon or polymethyl methacrylate.
Above-mentioned organic electroluminescent device for example also comprises hole transmission layer, is arranged between transparent electrode layer and the organic luminous layer.
Above-mentioned organic electroluminescent device for example also comprises electron transfer layer, is arranged between this metal electrode layer and this organic luminous layer.
In the organic electroluminescent device of the present invention, because in the light that organic luminous layer sent, neither meeting produces total reflection when the end face of most light incident lens and band-like surface, that is most light all can be smoothly penetrates from the end face and the band-like surface of lens, and therefore organic electroluminescent device of the present invention has higher luminous efficiency.
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Fig. 1 is a kind of generalized section of known organic electroluminescent device.
Fig. 2 is the generalized section of the organic electroluminescent device of first embodiment of the invention.
Fig. 3 is the vertical view of the lens of first embodiment of the invention.
How Fig. 4 A to Fig. 4 C is for determining the schematic diagram of lens-shape shown in Figure 2.
Fig. 5 is the generalized section of the another kind of organic electroluminescent device of first embodiment of the invention.
Fig. 6 is the generalized section of the organic electroluminescent device of second embodiment of the invention.
The main element description of symbols
50: axis
100,200,200a, 200b: organic electroluminescent device
110: infrabasal plate
120: metal anode
130,230: organic luminous layer
132,232: light
140: transparent cathode
150: upper substrate
210: substrate
220,220a: metal electrode layer
240,240a: transparent electrode layer
250: passivation layer
260: lens
262: end face
264: the bottom surface
265,266,267: band-like surface
A, B, C, D, E: point
θ
0, θ
Ab, θ
a, θ
b, θ
B ': angle
A, b, w: length
H: thickness
Embodiment
First embodiment
Fig. 2 is the generalized section of the organic electroluminescent device of first embodiment of the invention.Please refer to Fig. 2, the organic electroluminescent device 200 of present embodiment comprises substrate 210, metal electrode layer 220, organic luminous layer 230, transparent electrode layer 240, passivation layer 250 and lens 260.Wherein, metal electrode layer 220 is arranged on the substrate 210, and organic luminous layer 230 is arranged on the metal electrode layer 220, and organic luminous layer 230 is suitable for emitting beam 232.Transparent electrode layer 240 is arranged on the organic luminous layer 230, and passivation layer 250 is arranged on the transparent electrode layer 240, and lens 260 are arranged on the passivation layer 250.In addition, lens 260 have relative end face 262 and bottom surface 264 and be connected in end face 262 and bottom surface 264 between a plurality of band-like surface (as band-like surface 265,266,267), it constitutes noncontinuous surface.These band-like surface 265,266,267 are inclined surface, and bigger near the band-like surface and the angle between the bottom surface 264 of bottom surface 264.In other words, the angle between band-like surface 267 and the bottom surface 264 is greater than the angle between band-like surface 266 and the bottom surface 264, and the angle between band-like surface 266 and the bottom surface 264 is greater than the angle between band-like surface 265 and the bottom surface 264.
In the above-mentioned organic electroluminescent device 200, the material of substrate 210 for example is a glass, the material of transparent electrode layer 240 for example be indium tin oxide (indium tin oxide, ITO), indium-zinc oxide (indium zinc oxide, IZO) or other electrically conducting transparent material.In addition, the material of lens 260 for example is a transparent material, as Merlon or polymethyl methacrylate etc.Passivation layer 250 materials for example are to select the material of high light transmittance for use.In addition, metal electrode layer 220 for example is an anode, and transparent electrode layer 240 for example is a negative electrode.
In the present embodiment, when applying bias voltage and stride across metal electrode layer 220 with transparent electrode layer 240, electronics can transfer to organic luminous layer 230 by transparent electrode layer 240.On the other hand, the hole can transfer to organic luminous layer 230 by metal electrode layer 220.At this moment, fixation phenomenon again can take place in electronics and hole in organic luminous layer 230, and then produces exciton to reach luminous effect.In addition, though the light 232 that organic luminous layer 230 is sent is towards penetrating from all directions, but the light 232 towards the below scattering can be reflected by metal electrode layer 220, so the organic electroluminescent device 200 of present embodiment is the top emission type organic electro luminescent element.
Fig. 3 is the vertical view of the lens of first embodiment of the invention.Please refer to Fig. 2 and Fig. 3, in the present embodiment, the profile in the cross section of the profile of the end face 262 of lens 260 and bottom surface 264 and each band-like surface 265,266,267 parallel bottom surfaces 246 can be circle or and the profile similarity on organic luminous layer 230 and the composition surface of transparent electrode layer 240.For instance, when the profile on organic luminescent layer 230 and the composition surface of transparent electrode layer 240 was rectangle, the profile in the cross section of the end face 262 of lens 260 and bottom surface 264 and each band-like surface 265,266,267 parallel bottom surfaces 264 for example was rectangle (as shown in Figure 3).In addition, the profile size of the bottom surface 264 of lens 260 for example is identical with the profile size on the composition surface of transparent electrode layer 240 with organic luminous layer 230.In addition, lens 260 shown in Figure 2 are the cross sections along the I-I ' line of Fig. 3, and this cross section is the bottom surface 264 of vertical lens 260 and passes through rectangular centre and the cross section parallel with an opposite side of rectangle.
Below will introduce the design principle of the profile of lens 260.Please refer to Fig. 4 A to Fig. 4 C, how its expression determines the schematic diagram of lens-shape shown in Figure 2.In the present embodiment, the step of profile of decision lens 260 for example is the width of calculating end face 262 earlier, then calculate again the inclined degree of each band-like surface 265 and each band-like surface 265 from peak the beeline to minimum point.Wherein, because the thickness of organic luminous layer 230, metal electrode layer 220 and transparent electrode layer 240 much smaller than the thickness of passivation layer 250, is not considered the refraction of light 232 between organic luminous layer 230 and transparent electrode layer 240 when calculating.In addition, for convenience of description, suppose that in the present embodiment passivation layer 250 is identical with the refractive index of lens 260, and hypothesis organic luminous layer 230 is in close proximity to passivation layer 250 belows, and the profile of this organic luminous layer 230 are length of sides is the square of 2w.
The Breadth Maximum of end face 262 how to make lens 260 below will be described.Please refer to Fig. 4 A, its axis 50 is the axis by organic luminous layer 230 centers.According to department is that ear law (Snell ' sLaw) can be calculated the angle of total reflection θ between lens 260 and the air
0=sin
-1(1/n), wherein n is the refractive index of passivation layer 250 and lens 260.Then, the incidence angle of finding out the light 232 incident end faces 262 that send from the some A place of organic luminescent layer 230 equals angle of total reflection θ
0Position (promptly putting the D place).Afterwards, according to tan θ
0=(a+w)/H (H is lens 260 and the thickness of passivation layer 250) calculates a=Htan θ
0-w, and calculate the value of the Breadth Maximum 2a of end face 262.In other words, the width of end face 262 can be less than or equal to 2a, so can make the incidence angle of the light 232 incident end faces 262 that organic luminous layer 230 sends be less than or equal to the angle of total reflection, produces the probability of total reflections to reduce light 232.
Please refer to Fig. 4 B, behind the width of making end face 262, then will make the maximum angle θ between band-like surface 265 and the end face 262
AbThe method of definition is to consider the light 232 that sends from the some B of organic luminous layer 230, and increases the angle between band-like surface 265 and the end face 262 gradually, equals angle of total reflection θ up to the incidence angle of the some D of light 232 incident band-like surface 265
0, the angle between band-like surface 265 and the end face 262 is maximum angle θ at this moment
Ab, θ wherein
Ab=tan
-1[H/ (w-a)]+θ
0-90 °.
Please refer to Fig. 4 C, at the maximum angle θ that makes between band-like surface 265 and the end face 262
AbTo make the peak of band-like surface 265 and the maximum of the beeline between the minimum point afterwards, that is make the value of maximum length b.The method of definition is that the incidence angle of considering the light 232 incident band-like surface 265 sent from the some A of organic luminous layer 230 equals angle of total reflection θ
0Position (promptly putting the E place).Wherein, b=[H-tan θ
b(a+w)]/sin θ
Ab+ tan θ
bCos θ
Ab, and θ
b=90 °-θ
0-θ
Ab
Then, repeat the profile that the method described in Fig. 4 B and Fig. 4 C is made band-like surface 266,267 successively, to obtain the shape of lens 260 as shown in Figure 2.Because in the cross section of lens 260 shown in Figure 2, the incidence angle of each point all is less than or equal to angle of total reflection θ on the end face 262 of the light 232 incident lens 260 that organic luminescent layer 230 is sent and each band-like surface 265,266,267
0, make light 232 to penetrate from lens 260 smoothly.Therefore, the organic electroluminescence structure 200 of present embodiment has higher luminous efficiency.
What deserves to be mentioned is, when the refractive index of the refractive index of lens 260 and passivation layer 250 not simultaneously, then need consider the refraction of light 232 between lens 260 and passivation layer 250.In addition, when desire is designed to circle with the profile in the cross section of the profile of the end face 262 of lens 260 and bottom surface 264 and each band-like surface 265,266,267 parallel bottom surfaces 246, also can utilize said method to design the shape of lens.
Fig. 5 is the generalized section of the another kind of organic electroluminescent device of first embodiment of the invention.Please refer to Fig. 5, the organic electroluminescent device 200a of present embodiment is similar to organic electroluminescent device 200 shown in Figure 2, and difference is in organic electroluminescent device 200a and also comprises hole transmission layer 270 and electron transfer layer 280.Wherein, hole transmission layer 270 is arranged between metal electrode layer 220 and the organic luminous layer 230, and electron transfer layer 280 is arranged between transparent electrode layer 240 and the organic luminous layer 230.It should be noted that at organic electroluminescent device 200a and also can omit hole transmission layer 270 or electron transfer layer 280.
Second embodiment
Fig. 6 is the generalized section of the organic electroluminescent device of second embodiment of the invention.Please refer to Fig. 6, be different from organic electroluminescent device 200, the 200a of first embodiment, the organic electroluminescent device 200b of present embodiment is a bottom-emission type organic electroluminescent device, and it comprises substrate 210, transparent electrode layer 240a, organic luminous layer 230, metal electrode layer 220a and lens 260.Wherein, transparent electrode layer 240a is arranged on the first surface 212 of substrate 210, and organic luminous layer 230 is arranged on the transparent electrode layer 240a, and organic luminous layer 230 is suitable for emitting beam 232.Metal electrode layer 220a is arranged on the organic luminous layer 230, and lens 260 are arranged on the second surface 214 of substrate 210, and second surface 214 is relative with first surface 212.In addition, because the profile of lens 260 is described similar to first embodiment, so will no longer repeat at this.
Among the above-mentioned organic electroluminescent device 200b, transparent electrode layer 240a for example is an anode, and metal electrode layer 220a for example is a negative electrode.Owing in the light 232 that organic luminous layer 230 is sent, be reflected by metal electrode layer 220a towards light 232 meetings of top scattering, so the organic electroluminescent device 200b of present embodiment is a bottom-emission type organic electroluminescent device.In addition, the material of the material of the lens 260 of present embodiment, the material of substrate 210 and transparent electrode layer 240a please refer to above stated specification to similar described in first embodiment.
Similar to first embodiment, when the profile on organic luminescent layer 230 and the composition surface of transparent electrode layer 240a is rectangle, in the bottom surface 264 of vertical lens 260 and in by rectangular centre and the cross section parallel with an opposite side of rectangle, the light 232 incident end faces 262 that send from organic luminescent layer 230 and the incidence angle of each band-like surface 265,266,267 for example are less than or equal to the angle of total reflection between lens 260 and the air.So, in the light 232 that organic luminous layer 230 is sent, most light 232 all can penetrate from lens 260 each band-like surface 265,266,267 smoothly, so organic electroluminescent device 200b also has higher luminous efficiency.
In the present embodiment, also can be in hole transmission layer (not indicating) being set between transparent electrode layer 240a and the organic luminous layer 230 or electron transfer layer (not indicating) being set between metal electrode layer 220a and organic luminous layer 230.
In sum, in organic electroluminescent device of the present invention, because in the light that organic luminous layer sent, the end face of most light incident lens and the incidence angle of band-like surface are less than the angle of total reflection between lens and the air, but that is all end face and the band-like surface ejaculations of scioptics of most light, so organic electroluminescent device of the present invention has higher luminous efficiency.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; any person of ordinary skill in the field; without departing from the spirit and scope of the present invention; when can doing a little change and improvement, so protection scope of the present invention is as the criterion when looking the claim person of defining.
Claims (14)
1. organic electroluminescent device is characterized in that comprising:
Substrate;
Metal electrode layer is arranged on this substrate;
Organic luminous layer is arranged on this metal electrode layer;
Transparent electrode layer is arranged on this organic luminous layer;
Passivation layer is arranged on this transparent electrode layer; And
Lens, be arranged on this passivation layer, these lens have relative end face and bottom surface and be connected this end face and this bottom surface between a plurality of band-like surface, and above-mentioned these band-like surface constitute noncontinuous surface, wherein above-mentioned these band-like surface are inclined surface, and it is bigger near the band-like surface and the angle between this bottom surface of this bottom surface
Wherein, the profile of this organic luminous layer is that the length of side is the square of 2w, the angle of total reflection θ between these lens and the air
0=sin
-1(1/n), wherein the refractive index of this passivation layer and lens is all n, according to tan θ
0=(a+w)/and H, H is the thickness of these lens and this passivation layer, calculates a=Htan θ
0-w, the Breadth Maximum of this end face are 2a,
Maximum angle θ between this band-like surface and this end face
Ab=tan
-1[H/ (w-a)]+θ
0-90 °,
The peak of this band-like surface and the maximum b=[H-tan θ of the beeline between the minimum point
b(a+w)]/sin θ
Ab+ tan θ
bCos θ
Ab, and θ
b=90 °-θ
0-θ
Ab,
The incidence angle of each point all is less than or equal to angle of total reflection θ on the end face of these lens of light incident that thus, this organic luminous layer sent and each band-like surface
0
2. organic electroluminescent device according to claim 1, the profile that it is characterized in that the composition surface of this organic luminous layer and this transparent electrode layer is a rectangle, and this end face of these lens and the profile of this bottom surface are circular, and respectively the profile in the cross section of this parallel this bottom surface of band-like surface is circular.
3. organic electroluminescent device according to claim 1, the profile that it is characterized in that the composition surface of this organic luminous layer and this transparent electrode layer is a rectangle, and this end face of these lens and the profile of this bottom surface are rectangle, and respectively the profile in the cross section of this parallel this bottom surface of band-like surface is a rectangle.
4. organic electroluminescent device according to claim 1, the material that it is characterized in that these lens is a transparent material.
5. organic electroluminescent device according to claim 4, it is characterized in that this transparent material be Merlon (polycarbonate, PC) or polymethyl methacrylate (polymethyl methacrylate, PMMA).
6. organic electroluminescent device according to claim 1 is characterized in that also comprising hole transmission layer, is arranged between this metal electrode layer and this organic luminous layer.
7. organic electroluminescent device according to claim 1 is characterized in that also comprising electron transfer layer, is arranged between this transparent electrode layer and this organic luminous layer.
8. organic electroluminescent device is characterized in that comprising:
Substrate;
Transparent electrode layer is arranged on the first surface of this substrate;
Organic luminous layer is arranged on this transparent electrode layer;
Metal electrode layer is arranged on this organic luminous layer; And
Lens, be arranged on the second surface of this substrate, and this second surface is relative with this first surface, these lens have relative end face and bottom surface and be connected this end face and this bottom surface between a plurality of band-like surface, and above-mentioned these band-like surface constitute noncontinuous surface, wherein above-mentioned these band-like surface are inclined surface, and bigger near the band-like surface and the angle between this bottom surface of this bottom surface
Wherein, the profile of this organic luminous layer is that the length of side is the square of 2w, the angle of total reflection θ between these lens and the air
0=sin
-1(1/n), wherein the refractive index of this passivation layer and lens is all n, according to tan θ
0=(a+w)/and H, H is the thickness of these lens and this passivation layer, calculates a=Htan θ
0-w, the Breadth Maximum of this end face are 2a,
Maximum angle θ between this band-like surface and this end face
Ab=tan
-1[H/ (w-a)]+θ
0-90 °,
The peak of this band-like surface and the maximum b=[H-tan θ of the beeline between the minimum point
b(a+w)]/sin θ
Ab+ tan θ
bCos θ
Ab, and θ
b=90 °-θ
0-θ
Ab,
The incidence angle of each point all is less than or equal to angle of total reflection θ on the end face of these lens of light incident that thus, this organic luminous layer sent and each band-like surface
0
9. organic electroluminescent device according to claim 8, the profile that it is characterized in that the composition surface of this organic luminous layer and this transparent electrode layer is a rectangle, and this end face of these lens and the profile of this bottom surface are circular, and respectively the profile in the cross section of this parallel this bottom surface of band-like surface is circular.
10. organic electroluminescent device according to claim 8, the profile that it is characterized in that the composition surface of this organic luminous layer and this transparent electrode layer is a rectangle, and this end face of these lens and the profile of this bottom surface are rectangle, and respectively the profile in the cross section of this parallel this bottom surface of band-like surface is a rectangle.
11. organic electroluminescent device according to claim 8, the material that it is characterized in that these lens is a transparent material.
12. organic electroluminescent device according to claim 11 is characterized in that this transparent material is Merlon or polymethyl methacrylate.
13. organic electroluminescent device according to claim 8 is characterized in that also comprising hole transmission layer, is arranged between this transparent electrode layer and this organic luminous layer.
14. organic electroluminescent device according to claim 8 is characterized in that also comprising electron transfer layer, is arranged between this metal electrode layer and this organic luminous layer.
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|---|---|---|---|
| CN2005100930035A CN1921718B (en) | 2005-08-24 | 2005-08-24 | Organic electroluminescent cell |
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|---|---|---|---|
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003007663A1 (en) * | 2001-07-10 | 2003-01-23 | Trustees Of Princeton University | Micro-lens arrays for display intensity enhancement |
| CN1599521A (en) * | 2003-09-15 | 2005-03-23 | 统宝光电股份有限公司 | Organic luminous component with optical efficiency raising structure |
-
2005
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003007663A1 (en) * | 2001-07-10 | 2003-01-23 | Trustees Of Princeton University | Micro-lens arrays for display intensity enhancement |
| CN1599521A (en) * | 2003-09-15 | 2005-03-23 | 统宝光电股份有限公司 | Organic luminous component with optical efficiency raising structure |
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