CN1825617A - Durable organic electroluminescent display panel - Google Patents
Durable organic electroluminescent display panel Download PDFInfo
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- CN1825617A CN1825617A CN 200610002330 CN200610002330A CN1825617A CN 1825617 A CN1825617 A CN 1825617A CN 200610002330 CN200610002330 CN 200610002330 CN 200610002330 A CN200610002330 A CN 200610002330A CN 1825617 A CN1825617 A CN 1825617A
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Abstract
The invention discloses an organic electroluminescence display panel, especially an organic electroluminescence display panel able to prolong service life, mainly making corresponding regulation on the number of bottom electrodes and aligning electrodes of a traditional electroluminescence display panel and making the number of configured aligning electrodes less than that of configured bottom electrodes, thus able to reduce the supplied instantaneous currents between the bottom electrodes and aligning electrodes and the instantaneous brightness of organic luminous layers on the premise of not influencing display brightness of the display panel, so as to prolong the service life of the display panel.
Description
Technical field
The present invention relates to a kind of organic electric-excitation luminescent displaying panel that improves useful life, wherein by the number that is provided with that changes lower electrode and counter electrode, to reach the purpose of the moment brightness that reduces organic luminous layer.
Background technology
Along with constantly progressing greatly of electronic industry manufacturing technology, make some portable electronic products also prosperous thereupon, for example: mobile phone, PDA and meter type computer or the like.And the display screen that is applied on these portable electronic products mainly includes LCD (LCD), plasma display (PDP) and Organic Light-Emitting Device (OLED).
Wherein, organic electroluminescence display device is compared to other Display Technique, have that self-luminous, high brightness, wide viewing angle, low power consumption, high answer speed, panel are frivolous, advantage such as modular construction and manufacturing are simple, so especially be subjected to gazing at of various countries research unit and manufacturer.
Organic electric-excitation luminescent displaying panel mainly is sequentially provided with a bottom electrode 11, organic luminous layer 13 and counter electrode 15 as shown in Figures 1 and 2 on substrate 20.Wherein, lower electrode 11 and counter electrode 15 are provided with in an interlaced mode, and on the intervening portion of lower electrode 11 and counter electrode 15, are formed with a pixel (pixel) or inferior pixel (sub-pixel) 14.
When supply between bottom electrode 11 and the counter electrode 15 has a current signal, this current signal will be passed to the organic luminous layer 13 between lower electrode 11 and the counter electrode 15, and cause organic luminous layer 13 luminous.This can lower electrode 11 and counter electrode 15 between current signal whether supply with, reach the luminous purpose of each pixel of control or inferior pixel 14.
The type of drive of organic electric-excitation luminescent displaying panel 100, mainly organic electric-excitation luminescent displaying panel 100 is divided into scan electrode (Scanning electrode) and data electrode (Data electrode), for example, be scan electrode with counter electrode 15, and lower electrode 11 is a data electrode.In regular turn to counter electrode 15 (scan electrode) input one scan signal, and cause on each bar counter electrode 15 and have the scanning signal in regular turn.
When having the scanning signal on the counter electrode 15, will have a corresponding data signals on the lower electrode 11.By the conducting of the data signals of the scanning signal of counter electrode 15 and lower electrode 11, with the luminosity of all pixels on the may command counter electrode 15 or inferior pixel 14.Then, again next bar counter electrode 15 is scanned the input of signal, and make that the organic luminous layer 13 on next bar counter electrode 15 is luminous, and reach the purpose that shows with organic electric-excitation luminescent displaying panel 100.
In other words, the driving order of organic electric-excitation luminescent displaying panel 100 is as follows: to first counter electrode, 151 inputs, one first scanning signal, and by the conducting of first on the data signals on the lower electrode 11 and first counter electrode 151 scanning signal, cause the organic luminous layer 13 on first counter electrode 151 luminous, and all pixels on may command first counter electrode 151 or the luminosity of inferior pixel 14.Then carry out second counter electrode 153, the 3rd counter electrode 155 more in regular turn ... the pixel to the n counter electrode 159 or the driving of inferior pixel 14.
For luminosity and the display quality of organic electric-excitation luminescent displaying panel 100, need to limit the sweep time that scans the 159 required costs of n counter electrode on the organic electric-excitation luminescent displaying panel 100 by first counter electrode 151 in regular turn in order to keep panel.For example, be that the number that is provided with of T and counter electrode (scan electrode) 15 is 10 (n=10) when sweep time, the fluorescent lifetime of then representing the organic luminous layer 13 on each bar counter electrode 15 is T/10.
Again, for organic electric-excitation luminescent displaying panel 100, the moment brightness required with it of the fluorescent lifetime of the organic luminous layer 13 on each bar counter electrode 15 is an inverse relation, for this reason to keep the luminosity of organic electric-excitation luminescent displaying panel 100.In other words, when the fluorescent lifetime of each bar organic luminous layer 13 shortens, the current signal of being supplied with between lower electrode 11 and the counter electrode 15 certainly will will be improved, to increase the moment brightness of organic luminous layer 13, can make that just organic electric-excitation luminescent displaying panel 100 obtains identical display brightness and display quality.
Yet for organic electric-excitation luminescent displaying panel 100, along with the increase of current signal between counter electrode 15 and the lower electrode 11, and the raising of the moment brightness of organic luminous layer 13, will cause the material structure of organic luminous layer 13 to damage.Therefore for organic electric-excitation luminescent displaying panel 100, it is special when organic electric-excitation luminescent displaying panel 100 is a passive type organic electric-excitation luminescent displaying panel (PassiveMatrix OLED), along with the increase of counter electrode 15 numbers, will be to causing greatest influence the useful life of organic electric-excitation luminescent displaying panel 100.
Summary of the invention
For this reason, how to design a kind of organic electric-excitation luminescent displaying panel of novelty, not only can effectively improve the useful life of organic electric-excitation luminescent displaying panel, and help showing with organic electric-excitation luminescent displaying panel, this is invention emphasis of the present invention.
Main purpose of the present invention is to provide a kind of organic electric-excitation luminescent displaying panel that improves useful life, mainly adjusts the number that is provided with of lower electrode and counter electrode, to reduce the immediate current of being supplied with between lower electrode and the counter electrode.
Secondary objective of the present invention, be to provide a kind of organic electric-excitation luminescent displaying panel that improves useful life, what mainly make counter electrode is provided with the be provided with number of number less than lower electrode, with the moment brightness of reduction organic luminous layer, and reach the person in useful life who improves organic electric-excitation luminescent displaying panel.
Another purpose of the present invention, be to provide a kind of organic electric-excitation luminescent displaying panel that improves useful life, it mainly carries out the adjustment of the quantity of lower electrode and counter electrode, will make organic electric-excitation luminescent displaying panel become the display unit of a wide screen for this reason.
For this reason, the invention provides a kind of organic electric-excitation luminescent displaying panel that improves useful life, it is mainly constructed and includes: at least one lower electrode; At least one organic luminous layer is arranged on the lower electrode; And at least one counter electrode, be arranged on the organic luminous layer; Wherein, the ratio that number is set of lower electrode and counter electrode is between 1.7 to 1.875.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 is the vertical view of prior art organic electric-excitation luminescent displaying panel;
Fig. 2 is the section construction generalized section of prior art organic electric-excitation luminescent displaying panel;
Fig. 3 can improve the vertical view of organic electric-excitation luminescent displaying panel one preferred embodiment in useful life for the present invention;
Fig. 4 is the section construction generalized section of the embodiment of the invention;
Fig. 5 is the section construction generalized section of further embodiment of this invention.
Wherein, Reference numeral:
100 organic electric-excitation luminescent displaying panels, 11 lower electrodes
14 pixels of 13 organic luminous layers
15 counter electrodes, 151 first counter electrodes
153 second counter electrodes 155 the 3rd counter electrode
159 n counter electrodes, 20 substrates
30 organic EL components
300 organic electric-excitation luminescent displaying panels, 301 organic electric-excitation luminescent displaying panels
31 lower electrodes, 33 organic luminous layers
331 first organic luminous layers, 333 second organic luminous layers
34 pixels of 335 the 3rd organic luminous layers
35 counter electrodes, 351 first counter electrodes
353 second counter electrodes 355 the 3rd counter electrode
359 n counter electrodes, 40 colored filters
41 transparent substrates, 43 black matrix"s
45 chromatic photoresists, 47 planarization layers
49 block layer 50 substrate
Embodiment
At first, see also Fig. 3 and shown in Figure 4, be respectively vertical view and section construction generalized section that the present invention can improve organic electric-excitation luminescent displaying panel one preferred embodiment in useful life.As shown in the figure, organic electric-excitation luminescent displaying panel 300 of the present invention mainly is provided with at least one organic EL component 30 in a colored filter 40.Wherein colored filter 40 is provided with at least one chromatic photoresist 45 and black matrix" 43 in a transparent substrates 41, is provided with a planarization layer (overcoat) 47 more in regular turn and/or blocks layer (barrier layer) 49 on black matrix" (black matrix) 43 and/or chromatic photoresist 45.
Organic EL component 30 can be a passive type organic EL component (Passive MatrixOLED), include the stacked of at least one lower electrode 31, organic luminous layer 33 and counter electrode 35, wherein lower electrode 31 and counter electrode 35 are interlaced, and are formed with at least one pixel or inferior pixel 34 in intervening portion.Lower electrode 31 is made by the material of a tool printing opacity conductive characteristic, for example, and indium zinc oxide film (IZO) and indium-tin oxide film materials such as (ITO); Counter electrode 35 is then made by the metal material of a tool conductive characteristic.
The type of drive of organic electric-excitation luminescent displaying panel 300 is as the organic electric-excitation luminescent displaying panel 100 of prior art, in regular turn to each bar counter electrode (scan electrode) 35 input scan signal.For example, in regular turn to first counter electrode 351, second counter electrode 353, the 3rd counter electrode 355 ... to n counter electrode 359 input scan signals.And make data signals on the lower electrode (data electrode) 31 and the scanning signal on the counter electrode (scan electrode) 35 arrange in pairs or groups mutually, cause the organic luminous layer 33 on each bar counter electrode 35 luminous in regular turn, and reach the luminosity of each pixel of control or inferior pixel 34.
Again, can learn, when number is set increases of the counter electrode 15 of organic electric-excitation luminescent displaying panel 100, will be impacted the useful life of organic electric-excitation luminescent displaying panel 100 by the structure of prior art.Yet, have to increase the number of counter electrode 15 and lower electrode 11 again in order to improve the size of organic electric-excitation luminescent displaying panel 100.
Because the display size of the organic electric-excitation luminescent displaying panel 100 of general prior art is to prolong the demonstration specification of attacking traditional C RT display unit or liquid crystal indicator, and makes lower electrode 11 and counter electrode 15 have the close number that is provided with.For example, the ratio that quantity is set of lower electrode 11 and counter electrode 15 is between 1 to 1.4.
Yet, for organic electric-excitation luminescent displaying panel 300 passive type organic electric-excitation luminescent displaying panel particularly, this display floater specification that follows (ratio that quantity is set of lower electrode and counter electrode is between 1 to 1.4) is unfavorable for the extension in its useful life.
The present invention mainly improves the demonstration specification of organic electric-excitation luminescent displaying panel 300, and the quantity that is provided with of lower electrode 31 and counter electrode 35 adjusted, for example, make the ratio that quantity is set of lower electrode 31 and counter electrode 35 between 1.7 to 1.875.
For example, organic electric-excitation luminescent displaying panel 100 is provided with 160 lower electrodes 11 and 128 counter electrodes 15, and the display brightness of this organic electric-excitation luminescent displaying panel 100 is B1.Then according to inventive concept of the present invention, can have under the prerequisite of identical display brightness B1 at organic electric-excitation luminescent displaying panel 300, increase the quantity that is provided with of lower electrode 31, can under the prerequisite in the useful life that does not influence organic electric-excitation luminescent displaying panel 300, reach the purpose that improves organic electric-excitation luminescent displaying panel 300 sizes for this reason.For example, make organic electroluminescence panel 300 have 288 lower electrodes 31 and 128 counter electrodes 35.
Certainly in another embodiment of the present invention, also can reduce organic electroluminescence panel 300 counter electrode 35 quantity is set, to reach the useful life of improving organic electric-excitation luminescent displaying panel 300.For example, make the quantity that is provided with of counter electrode 35 (15) of organic electroluminescence panel 300 be reduced to 90, and the quantity that is provided with of its underpart electrode 31 is still kept 160 by above-mentioned 128.
The organic electric-excitation luminescent displaying panel 100 of prior art and being compared as follows of organic electric-excitation luminescent displaying panel 300 of the present invention: if prior art organic electric-excitation luminescent displaying panel 100 is provided with 160 lower electrodes 11 and 128 counter electrodes 15; Organic electric-excitation luminescent displaying panel 300 of the present invention is provided with 160 lower electrodes 31 and 90 counter electrodes 35.Being scanned up to the time that n counter electrode 359 (159) spent at both scanning signal in regular turn by first counter electrode 351 (151) is similarly under the situation of T.The fluorescent lifetime of the organic luminous layer 13 of prior art organic electric-excitation luminescent displaying panel 100 will be T/128; The fluorescent lifetime of the organic luminous layer 33 of organic electric-excitation luminescent displaying panel 300 of the present invention then is T/90.
In other words, the ratio of both fluorescent lifetimes is 90: 128.And have at organic electric-excitation luminescent displaying panel 300 and 100 under the prerequisite of identical display brightness, the organic luminous layer 13 of prior art and the moment brightness ratio of organic luminous layer 33 of the present invention will become an inverse relation 128: 90 with both fluorescent lifetimes.For this reason, organic electric-excitation luminescent displaying panel 300 can reach the purpose of the moment brightness that reduces its organic luminous layer 33 under the prerequisite that does not influence its display brightness.
Again, be provided with the organic electric-excitation luminescent displaying panel 300 of 90 counter electrodes 35 when practical application, the organic electric-excitation luminescent displaying panel 100 that is provided with 128 counter electrodes 15 with prior art has close visual experience.Yet the minimizing that quantity is set by counter electrode 35, can prolong the fluorescent lifetime of organic luminous layer 33 and reduce its moment brightness, along with the reduction of the moment brightness of organic luminous layer 33, can reach the purpose in the useful life that prolongs organic electroluminescence panel 300.
The demonstration specification of above-mentioned organic electric-excitation luminescent displaying panel 300 conforms to the present common on the market demonstration specification that MPEG4 presented, and for example, the file broadcast format of general MPEG 4 is about 16: 9.In other words, when the file that carries out MPEG 4 forms with organic electric-excitation luminescent displaying panel 300 was play, with can not be as the organic electric-excitation luminescent displaying panel 100 of prior art, the display floater that has the subregion can't participate in the situation that actual file is play.Carry out that to reduce organic electric-excitation luminescent displaying panel 300 the not formation of viewing area is arranged when file is play for this reason.
See also shown in Figure 5ly, be the section construction generalized section of further embodiment of this invention.As shown in the figure, organic electroluminescence panel 301 of the present invention mainly is provided with at least one organic EL component 30 in a substrate 50.Organic EL component 30 is the stacked of lower electrode 31, organic luminous layer 33 and counter electrode 35.Wherein, organic luminous layer 33 includes at least one first organic luminous layer 331, at least one second organic luminous layer 333 and at least one the 3rd organic luminous layer 335.And first organic luminous layer 331, second organic luminous layer 333 and the 3rd organic luminous layer 335 can produce first coloured light (ruddiness) L1, second coloured light (green glow) L2 and the 3rd coloured light (blue light) L3 respectively, and reach the purpose of full-colorization demonstration.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (11)
1, a kind of organic electric-excitation luminescent displaying panel that improves useful life is characterized in that, includes:
At least one lower electrode;
At least one organic luminous layer is arranged on the described lower electrode; And
At least one counter electrode is arranged on the described organic luminous layer;
The ratio that number is set of described lower electrode and described counter electrode is between 1.7 to 1.875.
2, organic electric-excitation luminescent displaying panel according to claim 1 is characterized in that, described organic electric-excitation luminescent displaying panel is a passive type.
3, organic electric-excitation luminescent displaying panel according to claim 1 is characterized in that, described lower electrode is made by a printing opacity conductive material.
4, organic electric-excitation luminescent displaying panel according to claim 3 is characterized in that, described lower electrode may be selected to be one of them of indium zinc oxide film or indium-tin oxide film.
5, organic electric-excitation luminescent displaying panel according to claim 1 is characterized in that, described counter electrode is made by the metal material of a tool conductive characteristic.
6, organic electric-excitation luminescent displaying panel according to claim 1 is characterized in that, described lower electrode, described organic luminous layer and described counter electrode are arranged on the substrate in a stacked mode.
7, organic electric-excitation luminescent displaying panel according to claim 6 is characterized in that, described organic luminous layer includes at least one first organic luminous layer, at least one second organic luminous layer and at least one the 3rd organic luminous layer.
8, organic electric-excitation luminescent displaying panel according to claim 7 is characterized in that, described first organic luminous layer can produce ruddiness; Described second organic luminous layer can produce green glow; And described the 3rd organic luminous layer then can produce blue light.
9, organic electric-excitation luminescent displaying panel according to claim 1 is characterized in that, described lower electrode, described organic luminous layer and described counter electrode are arranged on the colored filter in a stacked mode.
10, organic electric-excitation luminescent displaying panel according to claim 9 is characterized in that, described colored filter includes a transparent substrates, at least one black matrix" and at least one chromatic photoresist.
11, organic electric-excitation luminescent displaying panel according to claim 1 is characterized in that, the described demonstration specification that has electromechanics to excite display floater is identical with the file broadcast format of a MPEG 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610002330 CN1825617A (en) | 2006-01-26 | 2006-01-26 | Durable organic electroluminescent display panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610002330 CN1825617A (en) | 2006-01-26 | 2006-01-26 | Durable organic electroluminescent display panel |
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| Publication Number | Publication Date |
|---|---|
| CN1825617A true CN1825617A (en) | 2006-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610002330 Pending CN1825617A (en) | 2006-01-26 | 2006-01-26 | Durable organic electroluminescent display panel |
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| CN (1) | CN1825617A (en) |
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2006
- 2006-01-26 CN CN 200610002330 patent/CN1825617A/en active Pending
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