CN1870288A - Reflection organic electroluminescence panel and display - Google Patents
Reflection organic electroluminescence panel and display Download PDFInfo
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- CN1870288A CN1870288A CN 200610093845 CN200610093845A CN1870288A CN 1870288 A CN1870288 A CN 1870288A CN 200610093845 CN200610093845 CN 200610093845 CN 200610093845 A CN200610093845 A CN 200610093845A CN 1870288 A CN1870288 A CN 1870288A
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- organic electroluminescence
- electroluminescence panel
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Abstract
An organic electroluminescence panel of reflection type is prepared as setting a pair of the first transparent electrodes at one side of the first transparent base plate, and the first luminous layer between a pair of the first transparent electrodes as well as the second transparent electrode at another side of the first transparent base plate, setting the second reflection electrode at another side of the first transparent base plate opposite to the second transparent electrode and the second luminous layer between the second transparent electrode and the second reflection electrode.
Description
Technical field
The present invention relates to a kind of display of organic electroluminescence (organic electroluminescence display, OEL display), particularly relate to a kind of display of organic electroluminescence with high brightness and long service life.
Background technology
Flat-panel monitor 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 monitor has replaced cathode-ray tube display gradually.Lifting along with flat panel display, the product price of flat-panel monitor constantly reduces, make flat-panel monitor more universal and towards the development of big display size, and among various flat-panel monitors now, display of organic electroluminescence 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 electroluminescence panel 10.As shown in Figure 1, existing electroluminescence panel 10 comprises that substrate 12, first transparency electrode (anode) 14 are arranged at the surface that the surface of substrate 12, luminescent layer 16 are arranged at first transparency electrode 14, and second transparency electrode (negative electrode) 18 is arranged at the surface of luminescent layer 16.
The principle of luminosity of existing electroluminescence panel 10 is summarized as follows.Exist under the situation of bias voltage between first transparency electrode 14 and second transparency electrode 18, the hole can be entered in the luminescent layer 16 with characteristics of luminescence by first transparency electrode 14, and similarly electronics also can be entered in the luminescent layer 16 by second transparency electrode 18.Compound tense in luminescent layer 16 can form exciton (exciton) when electronics and hole, again energy is discharged and get back to ground state (ground State), and in the energy that these are released, because the difference of selected luminescent material, the part energy is discharged with the form of the light of different colours, and form the luminescence phenomenon of electroluminescence panel 10.
For existing electroluminescence panel, if the display frame of desiring to show high brightness must be kept high driving voltage, yet too high driving voltage consume electric power not only can have a strong impact on useful life simultaneously.
Summary of the invention
The object of the present invention is to provide a kind of reflection organic electroluminescence panel and display, to promote brightness and to increase the service life.
For reaching above-mentioned purpose, the invention provides a kind of reflection organic electroluminescence panel.Above-mentioned reflection organic electroluminescence panel comprises first transparency carrier, a side, first luminescent layer that a pair of first transparency electrode is arranged at this first transparency carrier be arranged at this between first transparency electrode, second transparency electrode opposite side, second reflecting electrode that are arranged at this first transparency carrier be arranged at the opposite side of this second transparency electrode with respect to this first transparency carrier, and second luminescent layer is arranged between this second transparency electrode and this second reflecting electrode.
For reaching above-mentioned purpose, the present invention provides a kind of display of organic electroluminescence in addition.Above-mentioned display of organic electroluminescence comprises aforesaid this reflection organic electroluminescence panel, and the transmission-type electroluminescence panel is stacked on this reflection organic electroluminescence panel.
Below be about detailed description of the present invention and accompanying drawing.Yet accompanying drawing is only for reference and aid illustration usefulness, is not to be used for the present invention is limited.
Description of drawings
Fig. 1 is the schematic diagram of existing electroluminescence panel.
Fig. 2 is the schematic diagram of the reflection organic electroluminescence panel of the preferred embodiment of the present invention.
Fig. 3 is the schematic diagram of the display of organic electroluminescence of another preferred embodiment of the present invention.
The simple symbol explanation
10 organic electroluminescence panels, 12 substrates
14 first transparency electrodes, 16 luminescent layers
18 second transparency electrodes, 50 reflection organic electroluminescence panels
52 first transparency carriers, 54,58 first transparency electrodes
56 first luminescent layers, 60 second transparency electrodes
62 second reflecting electrodes, 64 second luminescent layers
66 organic material layers, 68 silicon oxide layers
70 silicon nitride layers, 72 protective layers
74 external control element bonding pads, 80 transmission-type organic electroluminescence panels
82 second transparency carriers, 84,88 the 3rd transparency electrodes
86 the 3rd luminescent layers, 90,94 the 4th transparency electrodes
92 the 4th luminescent layers, 96 protective layers
98 external control element bonding pads, 100 conductive connecting devices
Embodiment
Please refer to Fig. 2.Fig. 2 is the schematic diagram of the reflection organic electroluminescence panel of the preferred embodiment of the present invention.As shown in Figure 2, the reflection organic electroluminescence panel 50 of present embodiment comprises that opposite side, second reflecting electrode 62 that a side, first luminescent layer 56 are arranged between first transparency electrode 54,58, second transparency electrode 60 is arranged at first transparency carrier 52 that first transparency carrier 52, a pair of first transparency electrode 54,58 are arranged at first transparency carrier 52 are arranged at the opposite side of second transparency electrode 60 with respect to first transparency carrier 52, and second luminescent layer 64 is arranged between second transparency electrode 60 and second reflecting electrode 62.In addition in the present embodiment; reflection organic electroluminescence panel 50 also comprises the protective layer 72 that is made of organic material layer 66, silicon oxide layer 68 and silicon nitride layer 70; its coating and protection reflection organic electroluminescence panel 50; and external control element bonding pad 74 is arranged on first transparency carrier 52, in order to connect external control circuit (figure does not show).
What deserves to be explained is that reflection organic electroluminescence panel 50 of the present invention is the single face display floater, and its display surface is the direction shown in the arrow of Fig. 2, wherein first transparency electrode 54,58, and first luminescence unit that is arranged at first luminescent layer, the 56 formation reflection organic electroluminescence panels 50 between first transparency electrode 54,58.Because first transparency electrode 54,58 is transparent conductive material, therefore the light that first luminescent layer 56 is produced when display frame can toward above with below two surface launchings, wherein up light (light of the directive display surface direction) light that can directly provide part brightness down to launch of emission then can pass first transparency carrier 52, and via second reflecting electrode 62 towards display surface direction reflection, and provide part brightness.On the other hand, be arranged at second transparency electrode 60, second reflecting electrode 62 of the opposite side of first transparency carrier 52, and second luminescent layer 64, then constitute second luminescence unit of reflection organic electroluminescence panel 50.The light that second luminescent layer 64 is produced also can be respectively toward top and below two surface launchings, wherein up the light of emission can pass first transparency carrier 52 and arrive display surface and contribute part brightness, down Fa She light then can be reflected towards display surface by second reflecting electrode 62, and part brightness is provided.Therefore, the brightness that the reflection organic electroluminescence panel 50 of present embodiment is produced is provided by two luminous luminescence units of while, so its brightness can reach more than two times of brightness of the electroluminescence panel that only has single luminescence unit.
The transparency carrier of the reflection organic electroluminescence panel of present embodiment can be any inorganic transparent material, as glass, quartz, or organic transparent material such as plastics, transparency electrode then can be any transparent conductive material, for example aluminium rubidium alloy or tin indium oxide etc., reflecting electrode then can be silver, nickel, gold or platinum etc. and has satisfactory electrical conductivity and reflexive material, and the material of luminescent layer then can be any luminous organic material or high-molecular luminous material.In addition, the sandwich construction that the protective layer of present embodiment is formed by organic material, silica and silicon nitride, however protective layer also can be single layer structure, and its material can be any suitable material.In addition, for injection and the efficiency of transmission that promotes hole and electronics, also can hole injection layer, hole transmission layer, electron injecting layer and electron transfer layer etc. be set if necessary between luminescent layer and the electrode.In addition, the reflection organic electroluminescence panel organic LED display panel or the high light that can be active formula or passive type divides light-emitting diode display floater etc.
Please refer to Fig. 3.Fig. 3 is the schematic diagram of the display of organic electroluminescence of another preferred embodiment of the present invention, wherein the display of organic electroluminescence of present embodiment comprises the reflection organic electroluminescence panel of previous embodiment, so components identical is used the components identical symbolic representation.As shown in Figure 3, the display of organic electroluminescence of present embodiment comprises reflection organic electroluminescence panel 50, and transmission-type organic electroluminescence panel 80 is stacked on the reflection organic electroluminescence panel 50.Reflection organic electroluminescence panel 50 comprises that opposite side, second reflecting electrode 62 that a side, first luminescent layer 56 are arranged between first transparency electrode 54,58, second transparency electrode 60 is arranged at first transparency carrier 52 that first transparency carrier 52, a pair of first transparency electrode 54,58 are arranged at first transparency carrier 52 are arranged at the opposite side of second transparency electrode 60 with respect to first transparency carrier 52, and second luminescent layer 64 is arranged between second transparency electrode 60 and second reflecting electrode 62.In addition, reflection organic electroluminescence panel 50 comprises that also protective layer 72 coats and protection reflection organic electroluminescence panel 50, and external control element bonding pad 74 is arranged on first transparency carrier 52.
Transmission-type organic electroluminescence panel 80 comprises that second transparency carrier 82, a pair of the 3rd transparency electrode 84,88 are arranged at second transparency carrier 82 in the face of a side, the 3rd luminescent layer 86 of reflection organic electroluminescence panel 50 is arranged between the 3rd transparency electrode 84,88, a pair of the 4th transparency electrode 90,94 is arranged at the opposite side of second transparency carrier 82 with respect to reflection organic electroluminescence panel 50, and the 4th luminescent layer 92 is arranged between the 4th transparency electrode 90,94.In addition, transmission-type organic electroluminescence panel 80 comprises that also protective layer 96 coats and protection transmission-type organic electroluminescence panel 80, and external control element bonding pad 98 is arranged on second transparency carrier 82, in order to accept the signal of external control circuit.In addition in the present embodiment, the external control element bonding pad 74 of reflection organic electroluminescence panel 50 utilizes conductive connecting device 100 to be electrically connected with the external control element bonding pad 98 of transmission-type organic electroluminescence panel 80, make reflection organic electroluminescence panel 50 and transmission-type organic electroluminescence panel 80 can accept the driving of same control circuit by this, yet application of the present invention is not limited to this, therefore the external control element bonding pad 74 of reflection organic electroluminescence panel 50 can not need mutual the electrical connection with the external control element bonding pad 98 of transmission-type organic electroluminescence panel 80, and adopts independent mode control respectively.
As shown in Figure 3, the display of organic electroluminescence of present embodiment comprises reflection organic electroluminescence panel 50 and transmission-type organic electroluminescence panel 80, and two sides of two sides of first transparency carrier 52 of reflection organic electroluminescence panel 50 and second transparency carrier 82 of transmission-type organic electroluminescence panel 80 include luminescence unit, therefore display of organic electroluminescence is equivalent to have four luminescence units, so its brightness can reach more than four times of brightness of the electroluminescence panel that only has single luminescence unit.Display of organic electroluminescence that what deserves to be explained is present embodiment does not in addition limit to and only uses single transmission-type organic electroluminescence panel 80, and the demand of visual brightness specifications is incorporated a plurality of transmission-type organic electroluminescence panels 80 into.In other words, the display of organic electroluminescence of present embodiment is an elementary cell with individual reflection formula organic electroluminescence panel 50, and the apparent luminance demand integrates one or more transmission-type organic electroluminescence panels 80, promotes the brightness performance by this.In the case, for reflection organic electroluminescence panel 50 and transmission-type organic electroluminescence panel 80, need not utilize the high driving voltage mode to promote brightness, can significantly increase the overall brightness of display of organic electroluminescence, so can prolong the useful life of display of organic electroluminescence.
In sum, display of organic electroluminescence of the present invention has advantages such as high brightness and long service life, utilizes the practice of modular mode in conjunction with reflection organic electroluminescence panel and transmission-type organic electroluminescence panel simultaneously, more can import volume production easily.
The above only is the preferred embodiments of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (9)
1. reflection organic electroluminescence panel comprises:
First transparency carrier;
A pair of first transparency electrode is arranged at a side of this first transparency carrier;
First luminescent layer is arranged at this between first transparency electrode;
Second transparency electrode is arranged at the opposite side of this first transparency carrier;
Second reflecting electrode is arranged at the opposite side of this second transparency electrode with respect to this first transparency carrier; And
Second luminescent layer is arranged between this second transparency electrode and this second reflecting electrode.
2. reflection organic electroluminescence panel as claimed in claim 1 also comprises the external control element bonding pad, is arranged on this first transparency carrier.
3. reflection organic electroluminescence panel as claimed in claim 1 also comprises protective layer, and it coats this reflection organic electroluminescence panel.
4. reflection organic electroluminescence panel as claimed in claim 3, wherein this protective layer is single layer structure or sandwich construction.
5. display of organic electroluminescence comprises:
This reflection organic electroluminescence panel as claimed in claim 1; And
The transmission-type organic electroluminescence panel is stacked on this reflection organic electroluminescence panel.
6. display of organic electroluminescence as claimed in claim 5 also comprises at least one protective layer, and it coats this transmission-type organic electroluminescence panel.
7. display of organic electroluminescence as claimed in claim 5, wherein this transmission-type organic electroluminescence panel comprises:
Second transparency carrier;
A pair of the 3rd transparency electrode is arranged at the side of this second transparency carrier in the face of this reflection organic electroluminescence panel; And
The 3rd luminescent layer is arranged at this between the 3rd transparency electrode.
8. display of organic electroluminescence as claimed in claim 7, wherein this transmission-type organic electroluminescence panel also comprises:
A pair of the 4th transparency electrode is arranged at the opposite side of this second transparency carrier with respect to this reflection organic electroluminescence panel; And
The 4th luminescent layer is arranged at this between the 4th transparency electrode.
9. display of organic electroluminescence as claimed in claim 7 also comprises the external control element bonding pad, is arranged on this second transparency carrier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100938455A CN100449774C (en) | 2006-06-20 | 2006-06-20 | Reflection organic electroluminescence panel and display |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100938455A CN100449774C (en) | 2006-06-20 | 2006-06-20 | Reflection organic electroluminescence panel and display |
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| Publication Number | Publication Date |
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| CN1870288A true CN1870288A (en) | 2006-11-29 |
| CN100449774C CN100449774C (en) | 2009-01-07 |
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| CNB2006100938455A Active CN100449774C (en) | 2006-06-20 | 2006-06-20 | Reflection organic electroluminescence panel and display |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102427082A (en) * | 2011-08-26 | 2012-04-25 | 友达光电股份有限公司 | Electroluminescent display |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004327195A (en) * | 2003-04-24 | 2004-11-18 | Tohoku Pioneer Corp | Organic el panel and its manufacturing method |
| KR100528916B1 (en) * | 2003-06-25 | 2005-11-15 | 삼성에스디아이 주식회사 | Rear type electroluminescence device |
| FI20031251A (en) * | 2003-09-03 | 2005-03-04 | Nokia Corp | Manufacturing method for screen, electronic device and screen elements |
| JP2006156162A (en) * | 2004-11-30 | 2006-06-15 | Nikkiso Co Ltd | Field emission light |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102427082A (en) * | 2011-08-26 | 2012-04-25 | 友达光电股份有限公司 | Electroluminescent display |
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| Publication number | Publication date |
|---|---|
| CN100449774C (en) | 2009-01-07 |
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