CN100592531C - Organic electric exciting light emitting display - Google Patents
Organic electric exciting light emitting display Download PDFInfo
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- CN100592531C CN100592531C CN200610144406A CN200610144406A CN100592531C CN 100592531 C CN100592531 C CN 100592531C CN 200610144406 A CN200610144406 A CN 200610144406A CN 200610144406 A CN200610144406 A CN 200610144406A CN 100592531 C CN100592531 C CN 100592531C
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Abstract
This invention relates to an organic electric excited illumination display including an organic electric excited illumination panel and at least one light increasing membrane, in which, said panel includes multiple secondary pixels and at least one exit face, said light increasing membrane is set at the light exit face of the panel including multiple micro-mirror structures and the width of whichis smaller than a half of the least width of the secondary pixel.
Description
Technical field
The present invention refers to especially that relevant for a kind of organic electro-luminescent display a kind of setting has the organic electro-luminescent display that can promote luminance gain and can reduce the diaphragm that adds lustre to of image fog phenomenon.
Background technology
Flat-panel screens has conventional cathode ray tube (Cathode Ray Tube, CRT) the incomparable advantage of display, for example power saving, radiationless and compact etc., so flat-panel screens has replaced cathode-ray tube display gradually.Lifting along with the plane Display Technique, the product price of flat-panel screens constantly reduces, make flat-panel screens more universal and towards the development of big display size, and among various flat-panel screens now, organic electro-luminescent display is owing to have the advantage of high contrast, the product of being expected most in the market especially.
Please refer to Fig. 1.Fig. 1 is the schematic diagram of existing organic electro-luminescent display.As shown in Figure 1, existing organic electro-luminescent display 10 includes an infrabasal plate 12, a upper substrate 14, a plurality of luminescence component 16 and is arranged between infrabasal plate 12 and the upper substrate 14, and one adhesive layer 18 be arranged between infrabasal plate 12 and the upper substrate 14, in order to luminescence component 16 is sealed between infrabasal plate 12 and the upper substrate 14.
Each luminescence component 16 includes an anode 20, a negative electrode 22, and an organic luminous layer 24, is arranged between anode 20 and the negative electrode 22.When display frame, can there be a bias voltage between the anode 20 of luminescence component 16 and the negative electrode 22, this moment, the hole can be entered in the organic luminous layer 24 with characteristics of luminescence by anode 20, and similarly electronics also can be entered in the organic luminous layer 24 by negative electrode 22.When combining in organic luminous layer 24 with electronics again, the hole can form excitation photon (exciton), and this moment, excitation photon was in a high-energy and unsure state, when being returned to stable ground state, energy can give off energy, and the energy that these are released will discharge with the form of the light of different colours according to the luminescent material difference of organic luminous layer 24, and forms the luminescence phenomenon of luminescence component 16.
When display frame, the light L that luminescence component 16 is produced can launch to infrabasal plate 12 directions, wherein because infrabasal plate 12 (being generally glass material) is different with the refractive index of external environment (air), therefore light L is at the lower surface that penetrates infrabasal plate 12, when being the interface of infrabasal plate 12 and air, can produce refraction and the phenomenon that reflects.As shown in Figure 1, when light L is incident to the lower surface of infrabasal plate 12, incidence angle can produce refraction less than the light L of critical angle c and penetrate and form effective sunlight Le, and total reflection phenomenon can take place during greater than critical angle c when incidence angle, this moment, light L can be formed invalid light Li by the reflection of the lower surface of infrabasal plate 12 fully.Because in the light L that luminescence component 16 is launched, invalid light Li also can't penetrate infrabasal plate 12, therefore causes the luminous efficiency of existing organic electro-luminescent display 10 on the low side, and remains further to be promoted.
Summary of the invention
One of purpose of the present invention is to provide a kind of organic electro-luminescent display, to promote display brightness.
According to one embodiment of the invention, a kind of organic electro-luminescent display is provided, it comprises an organic electroluminescence panel, and at least one diaphragm that adds lustre to.Above-mentioned organic electroluminescence panel comprises pixel a plurality of times, and at least one exiting surface.The above-mentioned diaphragm that adds lustre to, be arranged at the exiting surface of organic electroluminescence panel, the diaphragm that adds lustre to comprises a plurality of micro mirror structures, and the width of each micro mirror structure is less than 1/2nd of the minimum widith of inferior pixel, and has a spacing between each described micro mirror structure, wherein each described micro mirror structure has a class semicircle spherical structure, and the spacing of adjacent class semicircle spherical structure is 0.78 micron, the width of each described micro mirror structure is the diameter of each described class semicircle spherical structure, and this diameter is 20 microns; Or each described micro mirror structure has a class half cylindrical structure, and the spacing of adjacent class half cylindrical structure is 5 microns, and the width of each described micro mirror structure is the diameter of each described class half cylindrical structure, and this diameter is 20 microns.
Organic electro-luminescent display of the present invention not only has the effect of luminance gain by the setting of the diaphragm that adds lustre to, and the problem of image output obfuscation of can not deriving simultaneously is so can effectively promote display quality.
Description of drawings
Fig. 1 is the schematic diagram of existing organic electro-luminescent display.
Fig. 2 is the generalized section of a preferred embodiment of organic electro-luminescent display of the present invention.
Fig. 3 is the top view of organic electro-luminescent display shown in Figure 2.
Fig. 4 is the graph of a relation of the blurred width of diameter when showing of present embodiment class semicircle spherical structure micromirror.
Fig. 5 is the Luminance Distribution schematic diagram of the inferior pixel of present embodiment.
Fig. 6 is the schematic diagram of another preferred embodiment of organic electro-luminescent display of the present invention.
Fig. 7 is the generalized section of organic electro-luminescent display shown in Figure 6.
Fig. 8 is the Luminance Distribution schematic diagram of the inferior pixel of present embodiment.
Fig. 9 is the brightness of organic electroluminescence panel of the present invention and the graph of a relation at visual angle.
Figure 10 makes the method schematic diagram of the diaphragm that adds lustre to for a preferred embodiment of the present invention.
The primary clustering symbol description
10: organic electro-luminescent display
12: infrabasal plate
14: upper substrate
16: luminescence component
18: adhesive layer
20: anode
22: negative electrode
24: organic luminous layer
50: organic electro-luminescent display
52: organic electroluminescence panel
54: diaphragm adds lustre to
56: inferior pixel
58: micro mirror structure
70: organic electro-luminescent display
72: organic electroluminescence panel
74: diaphragm adds lustre to
76: inferior pixel
76R: red time pixel
76G: green time pixel
76B: blue sub-pixels
78: micro mirror structure
80: substrate
82: photosensitive pattern
84: die
86: diaphragm adds lustre to
88: micro mirror structure
Embodiment
It below is relevant detailed description of the present invention.Yet accompanying drawing is only for reference and aid illustration, is not to be used for the present invention is limited.
Please refer to Fig. 2 and Fig. 3.Fig. 2 is the generalized section of a preferred embodiment of organic electro-luminescent display of the present invention, and Fig. 3 is the top view of organic electro-luminescent display shown in Figure 2.As Fig. 2 and shown in Figure 3, the organic electro-luminescent display 50 of present embodiment comprises an organic electroluminescence panel 52, and at least one diaphragm 54 that adds lustre to, and is arranged at the surface of organic electroluminescence panel 52.Organic electroluminescence panel 52 can be the electroluminescence panel of organic LED panel, polymer LED panel or other various types.Organic electroluminescence panel 52 comprises a plurality of pixels 56 (for example red time pixel, green time pixel and blue sub-pixels), and present embodiment is example explanation the present invention with single face light emitting-type panel, therefore a surface of organic electroluminescence panel 52 is an exiting surface, and the diaphragm 54 that adds lustre to is arranged on the exiting surface, but organic electro-luminescent display 50 of the present invention also can be dual-side luminescent type, two surfaces of organic electroluminescence panel 52 are exiting surface under this situation, and the diaphragm 54 that adds lustre to this moment can be arranged at respectively on its two exiting surface.
The diaphragm 54 that adds lustre to of the present invention comprises a plurality of micro mirror structures (microlens) 58, and the condition that is provided with of each micro mirror structure 58 is its width less than 1/2nd of the minimum widith of inferior pixel 56.In the present embodiment, micro mirror structure 58 is class semicircle sphere (hemisphere-like) structure, so the width of micro mirror structure 58 refers to the diameter of class semicircle spherical structure.In addition, micro mirror structure 58 is square type array (rectangular array) to be arranged, and for example square array (square array) is arranged.In addition, in the present embodiment, each time pixel 56 is a rectangular area, because of the minimum widith of this time pixel 56 is the width of rectangular area.
Please refer to Fig. 4, and in the lump with reference to figure 2 and Fig. 3.Fig. 4 is the graph of a relation of the blurred width (blur width) of diameter when showing of present embodiment class semicircle spherical structure micromirror, wherein the relation of the diameter of micro mirror structure and blurred width is drawn by optics emulation, 100 microns of the width of time pixel in this emulation, the diameter of class semicircle spherical structure is D (micron).In addition, blurred width is defined as the distance apart from time pixel edge 2w, and w meets the relation of I (w)=Io* (1/e), and wherein Io be the brightness of inferior pixel center, and I (w) is the brightness with inferior pixel distance w.As shown in Figure 4, the rough relation that presents inverse ratio of the diameter of blurred width and class semicircle spherical structure, at the diameter of class semicircle spherical structure is to heal under the little situation, blurred width is also little, and the heal blooming of little representative time pixel of blurred width is more not obvious, / 2nd when following of width that wherein is about time pixel at the diameter of class semicircle spherical structure, the blooming in the time of can improving display frame.
Please refer to Fig. 5.Fig. 5 is the Luminance Distribution schematic diagram of the inferior pixel of present embodiment, wherein in the present embodiment, inferior pixel is the rectangular area of 100 microns of one 100 microns *, micro mirror structure is to be the class semicircle spherical structure that square array is arranged, its diameter is 20 microns, and the spacing of adjacent class semicircle spherical structure (G that Fig. 3 indicates) is about 0.78 micron.As shown in Figure 5, no matter inferior pixel is the Luminance Distribution of horizontal direction (directions X) or the Luminance Distribution of vertical direction (Y direction), all the influence owing to the micromirror of class semicircle spherical structure has concentrated effect, therefore can produce the effect of luminance gain, and in addition since the diameter of the micro mirror structure of class semicircle sphere less than below 1/2nd of width of inferior pixel, so blooming can reduce and make adjacent inferior pixel can not produce situation about interfering with each other when display frame.
Please refer to Fig. 6 and Fig. 7.Fig. 6 is the schematic diagram of another preferred embodiment of organic electro-luminescent display of the present invention, and Fig. 7 is the generalized section of organic electro-luminescent display shown in Figure 6.As Fig. 6 and shown in Figure 7, the organic electro-luminescent display 70 of present embodiment comprises an organic electroluminescence panel 72, and at least one diaphragm 74 that adds lustre to, and is arranged at the surface of organic electroluminescence panel 72.Organic electroluminescence panel 72 comprises pixel 76 a plurality of times, comprise red time pixel 76R, green time pixel 76G and blue sub-pixels 76B, and the inferior pixel of same color is arranged along same direction (directions X), and in other words the inferior pixel of different colours is then arranged along the Y direction.
The diaphragm 74 that adds lustre to of the present invention comprises a plurality of micro mirror structures 78, and the condition that is provided with of each micro mirror structure 78 is that the width of micro mirror structure 78 is less than 1/2nd of the minimum widith of inferior pixel 76.Micro mirror structure 78 is square type array to be arranged, and for example square array is arranged.In addition, each time pixel 76 is a rectangular area, because of the minimum widith of this time pixel 76 is the width of rectangular area.Micro mirror structure 78 is class half round post (semicylinder-like) structure in the present embodiment, so the width of micro mirror structure 78 refers to the diameter of class half cylindrical structure.In addition, in the present embodiment, the length of class half cylindrical structure is less than the width (being the length of rectangular area) of inferior pixel, and all kinds of half cylindrical structure have a major axis (major axis) direction (shown in the arrow of Fig. 6), and long axis direction is parallel with the orientation (directions X) of the inferior pixel of same color.
Please refer to Fig. 8.Fig. 8 is the Luminance Distribution schematic diagram of the inferior pixel of present embodiment, wherein in the present embodiment, inferior pixel is the rectangular area of 100 microns of one 100 microns *, and micro mirror structure is to be the class half cylindrical structure that square array is arranged, the diameter of class half cylindrical structure is 20 microns, highly be 10 microns, length is 50 microns, and the spacing of adjacent class half cylindrical structure is 5 microns.As shown in Figure 8, the long axis direction of class half cylindrical structure is arranged along directions X, and it has spotlight effect in the Y direction, so the Luminance Distribution of the inferior pixel of Y direction is concentrated the situation that distributes owing to the spotlight effect that is subjected to the class half cylindrical structure presents.Because the inferior pixel of same pixel is arranged along the Y direction, even the Luminance Distribution of time pixel has the significant distribution scenario of concentrating in the Y direction in the present embodiment, but because three pixels of RGB still belong to same pixel, therefore human eye can't be differentiated the problem that time pixel interferes with each other in the same pixel, so the unlikely display frame distortion situation that causes.On the other hand, time pixel of the same color on the directions X adheres to different pixels separately, therefore because the class half cylindrical structure there is no spotlight effect at directions X, so generation interference between the unlikely inferior pixel that makes the same color that adheres to different pixels separately.Therefore, present embodiment can more reduce the problem of image fog.
Please refer to Fig. 9.Fig. 9 is the brightness of organic electroluminescence panel of the present invention and the graph of a relation at visual angle.As shown in Figure 9, compared to the organic electric-excitation luminescent display panel that the diaphragm that adds lustre to is not set, the brightness that is provided with the organic electroluminescence panel of the diaphragm that adds lustre to has significant increase.From the above, the diaphragm that adds lustre to of the present invention can effectively promote the display brightness of organic electroluminescence panel, can't produce the image fog problem and influences display quality.
Refer again to Figure 10.Figure 10 makes the method schematic diagram of the diaphragm that adds lustre to for a preferred embodiment of the present invention.As shown in figure 10, at first provide a substrate 80, and form a photosensitive material layer, for example a photoresist layer in the surface of substrate 80.Then utilize a lithographic fabrication processes that photosensitive material layer is defined as a plurality of photosensitive pattern 82, wherein the shape of photosensitive pattern 82 determines according to the shape of the micro mirror structure of follow-up desire formation.For instance, if micro mirror structure is a class semi-round ball structure, then photosensitive pattern 82 shapes are answered subcylindrical, and if micro mirror structure is the class half cylindrical structure, then photosensitive pattern 82 should be near rectangle.In addition, the layout of the micro mirror structure that the layout of photosensitive pattern 82 also forms according to follow-up desire determines, and photosensitive pattern 82 presents square the arrangement in the present embodiment.Subsequently, carry out a hot reflux (thermalreflow) manufacturing process, and make the shape of each photosensitive pattern 82 form semicircle spherical structure or half cylindrical structure by parameters such as controlling temperature, pressure and heating time.
Then, form a die 84, make die 84 have pattern with photosensitive pattern 82 complementations, and carry out a heat treatment manufacturing process and make die 84 have enough structural strengths on the surface of substrate 80 and photosensitive pattern 82.Subsequently, carry out a demoulding manufacturing process, die 84 is broken away from from the surface of substrate 80.At last, by die 84 and utilize little ejection formation or low-grade fever is molded etc. that technology can be produced the diaphragm 86 that adds lustre to micro mirror structure 88.The diaphragm 86 that will add lustre at last is pasted to the exiting surface of organic electroluminescence panel, promptly produces organic electro-luminescent display of the present invention.Worth explanation is to need through the hot reflux manufacturing process owing to photosensitive pattern, the structure of photosensitive pattern may slightly be subsided and can't be formed perfect semicircle spherical structure or half cylindrical structure, still can bring into play the effect that reduces image fog and promote brightness but form the micro mirror structure with class semicircle spherical structure or class half cylindrical structure.
In sum, organic electro-luminescent display of the present invention not only has the effect of luminance gain by the setting of the diaphragm that adds lustre to, and the problem of image output obfuscation of can not deriving simultaneously is so can effectively promote display quality.
The above only is preferred embodiment of the present invention, and all equalizations of being done according to claim scope of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (8)
1. organic electro-luminescent display comprises:
One organic electroluminescence panel comprises pixel a plurality of times, and at least one exiting surface; And
At least one diaphragm that adds lustre to, be arranged at described at least one exiting surface of described organic electroluminescence panel, the described diaphragm that adds lustre to comprises a plurality of micro mirror structures, and the width of each described micro mirror structure is less than 1/2nd of the minimum widith of described pixel, and has a spacing between each described micro mirror structure, wherein
Each described micro mirror structure has a class semicircle spherical structure, and the spacing of adjacent class semicircle spherical structure is 0.78 micron, and the width of each described micro mirror structure is the diameter of each described class semicircle spherical structure, and this diameter is 20 microns; Or
Each described micro mirror structure has a class half cylindrical structure, and the spacing of adjacent class half cylindrical structure is 5 microns, and the width of each described micro mirror structure is the diameter of each described class half cylindrical structure, and this diameter is 20 microns.
2. organic electro-luminescent display as claimed in claim 1 is characterized in that, described micro mirror structure is square type array and arranges.
3. organic electro-luminescent display as claimed in claim 2 is characterized in that, described micro mirror structure is square array and arranges.
4. organic electro-luminescent display as claimed in claim 1 is characterized in that, each described pixel is a rectangular area, and the minimum widith of each described pixel is the width of described rectangular area.
5. organic electro-luminescent display as claimed in claim 1 is characterized in that the length of each described class half cylindrical structure is less than the width of each described pixel.
6. organic electro-luminescent display as claimed in claim 1 is characterized in that, described time pixel comprises a plurality of redness time pixel, green time pixel and blue sub-pixels, and described pixel of same color arranged along same direction.
7. organic electro-luminescent display as claimed in claim 6 is characterized in that, each described class half cylindrical structure has a long axis direction, and described long axis direction is parallel with the orientation of described pixel of same color.
8. organic electro-luminescent display as claimed in claim 1 is characterized in that, described organic electroluminescence panel comprises an organic LED panel or a polymer LED panel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610144406A CN100592531C (en) | 2006-11-07 | 2006-11-07 | Organic electric exciting light emitting display |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610144406A CN100592531C (en) | 2006-11-07 | 2006-11-07 | Organic electric exciting light emitting display |
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| CN1945849A CN1945849A (en) | 2007-04-11 |
| CN100592531C true CN100592531C (en) | 2010-02-24 |
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| CN103715372B (en) * | 2013-12-26 | 2017-08-25 | 京东方科技集团股份有限公司 | OLED display panel and preparation method thereof |
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