CN1835180B - Electroluminance display - Google Patents
Electroluminance display Download PDFInfo
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- CN1835180B CN1835180B CN2006100343261A CN200610034326A CN1835180B CN 1835180 B CN1835180 B CN 1835180B CN 2006100343261 A CN2006100343261 A CN 2006100343261A CN 200610034326 A CN200610034326 A CN 200610034326A CN 1835180 B CN1835180 B CN 1835180B
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- 238000004020 luminiscence type Methods 0.000 claims abstract description 25
- 239000000843 powder Substances 0.000 claims description 58
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 29
- 239000000758 substrate Substances 0.000 claims description 28
- 230000010363 phase shift Effects 0.000 claims description 11
- 230000005669 field effect Effects 0.000 claims description 3
- 230000005684 electric field Effects 0.000 description 29
- 230000033001 locomotion Effects 0.000 description 13
- 230000004888 barrier function Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 239000004020 conductor Substances 0.000 description 6
- 239000011521 glass Substances 0.000 description 5
- 230000010287 polarization Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000005672 electromagnetic field Effects 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 241001025261 Neoraja caerulea Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910002114 biscuit porcelain Inorganic materials 0.000 description 1
- 230000009087 cell motility Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
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Abstract
An electro-luminescent (EL) display includes multiple luminescence units. Each luminescence unit includes a luminescence dielectric layer. There is a first electrode on one side of the luminescence dielectric layer. EL display also includes DC drive power source, and the first electrode is connected to positive pole of the DC drive power source. There are second and third electrodes setup on the other side of the luminescence dielectric layer corresponding to the first electrode. EL display also includes AC power source. The second electrode is connected to negative pole of the DC drive power source, and an output pole of the AC power source. The third electrode is connected to the other output pole of the AC power source. Lower driving voltage can be adopted in the EL display so as to reduce power consumption.
Description
[technical field]
The present invention relates to a kind of electroluminescent display, relate in particular to a kind of electroluminescent display that adopts low voltage to drive.
[background technology]
Any material all can be luminous under the exciting of certain temperature or electromagnetic field and ray, and every kind of material all has own specific spectrum when luminous.What is called excites, be exactly material in motion process, because of absorbing the energy of other motion material, make the motion of matter from a certain state, jump to a kind of physical phenomenon of another state.Electroluminescent display is exactly to utilize above-mentioned principle of luminosity to show.
An a kind of EL cell of electroluminescent display of prior art as shown in Figure 1, this electroluminescent display 1 comprises first pole plate 11, second pole plate 12 that is oppositely arranged, and be filled in luminescent material 16 between above-mentioned two pole plates 11,12, for example fluorescent material.When between first pole plate 11 and second pole plate 12, adding voltage, allow and to produce electric field between two pole plates, when electric field strength reaches certain intensity, fluorescent material will be excited and is luminous, because pole plate can block the radiation of light, therefore, in electroluminescent display, it must be transparent polar plate that a pole plate is arranged.Transparent polar plate generally all is to electroplate the very thin metallic conduction material of one deck on a transparent plastic or glass plate, as: nickel or platinum.
The electroluminescent technology is found by the people very early, but because electroluminescent needs very high driving voltage, and the colour purity problem of three primary colors does not obtain fine solution always yet, therefore, people seldom are applied to the electroluminescent technology in television set or the computer monitor, and most applications all is electroluminescent to be applied in aspects such as indicating device or display panel.At present, since the digital TV in high resolution technology rapid development, and existing cathode ray tube (Cathode Ray Tube, CRT) display technology has been difficult to satisfy the requirement that the HDTV (High-Definition Television) image shows, and therefore, various digital panel display technology occur one after another.
In the electroluminescent display 1 shown in Figure 1, the electric field strength that needs certain intensity, fluorescent material could be luminous and be used for showing, and electric field strength is just relevant with the driving voltage between first pole plate 11 and second pole plate 12, also and the distance dependent between first pole plate 11 and second pole plate 12.At present, although select the electroluminescent material that excites electric field strength lower for use, and do the distance between first pole plate 11 and second pole plate 12 very thin, its driving voltage also needs about 150U, still is difficult to satisfactory.
[summary of the invention]
For overcoming the higher defective of prior art electroluminescent display driving voltage, the invention provides a kind of electroluminescent display that adopts low voltage to drive.
A kind of technical scheme that the present invention provides for solving the problems of the technologies described above is: a kind of electroluminescent display, comprise a plurality of luminescence units, include a luminescence medium layer in each luminescence unit, one side of luminescence medium layer is provided with first electrode, opposite side is provided with second electrode, it is characterized in that: the same side at second electrode also is arranged at intervals with third electrode, described electroluminescent display also comprises DC driven power supply U1 and high-frequency ac power U2, second electrode is electrically connected to the negative pole of DC driven power supply U1 and the output stage of high-frequency ac power U2, third electrode is connected with the positive electrical of DC driven power supply U1, first electrode is electrically connected with another output stage of high-frequency ac power U2, and the operating frequency of described high-frequency ac power U2 is 100MHz to 1GHz.
Compared with prior art, electroluminescent display of the present invention adopts DC driven power supply and AC power to be respectively first electrode and second electrode, first electrode and third electrode on-load voltage, make that the phosphor powder layer back that is stimulated is luminous and show under two effect of electric field, thereby can reduce the driving voltage that loaded.And first electric field between electrode and the third electrode be AC field, can make that the electric field in the local dielectric is reinforced because the polarization speed of local dielectric does not catch up with the pace of change that adds AC field, can further reduce driving voltage.This shows that electroluminescent display of the present invention can adopt lower driving voltage, thus the amount of saving energy.
[description of drawings]
Fig. 1 is a kind of fundamental diagram of prior art electroluminescent display;
Fig. 2 is the structural representation of electroluminescent display first execution mode of the present invention;
Fig. 3 is the fundamental diagram of electroluminescent display shown in Figure 2;
Fig. 4 is the structural representation of electroluminescent display second execution mode of the present invention;
Fig. 5 is the fundamental diagram of electroluminescent display shown in Figure 4;
Fig. 6 is a kind of reality of the high-frequency ac power that adopts of electroluminescent display of the present invention
[embodiment]
Seeing also Fig. 2, is the structural representation of electroluminescent display first execution mode of the present invention.This electroluminescent display 2 comprises and is oppositely arranged and has one at least for transparent first substrate 21 and second substrate 22, and is arranged on the phosphor powder layer 26 between this first substrate and second substrate.This electroluminescent display 2 comprises a plurality of luminescence units, for example: red light-emitting unit, green luminescence unit and blue light emitting unit.In each luminescence unit, that first substrate 21 comprises first substrate 210 that is oppositely arranged and first insulating barrier 215 and space and be arranged on second electrode 212 and third electrode 214 between this first substrate 210 and first insulating barrier 215, second substrate 22 comprises second substrate 220, first electrode 224 and second insulating barrier 225 that is cascading, and this first insulating barrier 215 and second insulating barrier 225 all are close to phosphor powder layer 26 and are provided with.Second electrode 224 also is a public electrode, and it is a transparency electrode.This phosphor powder layer 26 comprises red light fluorescent powder unit 261, green light fluorescent powder unit 262 and the blue light fluorescent powder unit 263 that corresponds respectively to red light-emitting unit, green luminescence unit and blue light emitting unit.
Phosphorus is that a kind of ratio is easier to the luminous material that is excited, and therefore, a lot of fluorescent materials all select for use the mixture of phosphorus as luminescent material.
See also Fig. 3, this electroluminescent display 2 also comprises DC driven power supply U1 and high-frequency ac power U2, in each luminescence unit, this second electrode 212 is electrically connected to the negative pole of this DC driven power supply U1 and the output stage of this high-frequency ac power U2, third electrode 214 is connected with the positive electrical of DC driven power supply U1, and this first electrode 224 is electrically connected with another output stage of high-frequency ac power U2.DC driven power supply U1 is load driver voltage between the third electrode 214 and second electrode 212, and this high-frequency ac power U2 loads quiescent operation voltage between first electrode 224 and second electrode 212.
In the present embodiment, because when these electroluminescent display 2 work, meeting load driver voltage between the third electrode 214 and second electrode 212, and between first electrode 224 and second electrode 212, load operating voltage, therefore, phosphor powder layer 26 is equivalent to be excited under the acting in conjunction of two electric fields and is luminous, adopt two pole plates to provide the mode of an electric field to compare with prior art electroluminescent display 1, in the present embodiment, even power supply U1 and U2 adopt the DC driven power supply, this electroluminescent display 2 also can be worked under lower driving voltage.
In addition, when adopting DC driven power supply U1 load driver voltage between the third electrode 214 and second electrode 212, when this high-frequency ac power U2 loaded quiescent operation voltage between first electrode 224 and second electrode 212, its principle Analysis was as follows:
Any material all is that molecule is made up of atom again by molecular composition, and atom is made up of atomic nucleus and electronics again, and electronics rotates round atomic nucleus, and an electron is negatively charged, and the atomic nucleus positively charged.Under effect of electric field, electronics will move against the direction of electric field.If object is a conductor, electronics will produce travel motion under effect of electric field, and produce transference cell (sense of current is opposite with the direction of electron motion), and transference cell also is conduction current sometimes; If object is an insulator, electronics will produce displacement movement under effect of electric field, and produce displacement current.The difference of displacement current and conduction current is, conduction current is continuous, and by the negative terminal of conductor flow to power supply, and displacement current is discontinuous from the anode of power supply for it, it can only be in insulator, or in the local conductor, move to another point from certain point, and can not shift out outside the object, under action of alternative electric field, displacement current will move around, and therefore, it is that charged object is by the motion of electric field polarization that the motion of displacement current also can be called.
When dielectric is polarized by AC field, particularly exchange change frequency when very high, the speed of displacement current motion will be far smaller than the speed of transference cell motion in conductor in the dielectric, i.e. the speed of the polarized motion of dielectric always is slower than the speed of the polarized motion of conductor.The speed of this dielectric polarization motion is slower than the phenomenon of the speed of conductor polarization motion, and we are referred to as dielectric adsorption effect to it.Because dielectric adsorption effect, so propagation velocity can be slack-off in dielectric for electromagnetic field or electromagnetic wave, so dielectric in the waveguide of microwave transmission through being commonly used to microwave is carried out the purposes (longitudinal wave) of phase shift; And, in dielectric,, make that the electric field in the local dielectric is reinforced (lateral wave) because the polarization speed of local dielectric does not catch up with the pace of change of applying high frequency electric field.
In the present embodiment, phosphor powder layer 26 is dielectric, when high-frequency ac power U2 loads quiescent operation voltage between first electrode 224 and second electrode 212, this phosphor powder layer 26 can be in the AC field, according to above-mentioned analysis as can be known, adopt high-frequency ac power U2 between first electrode 224 and second electrode 212, to load quiescent operation voltage and can effectively improve the electric field strength that same electrical is depressed, in other words, when adopting high-frequency ac power U2 between first electrode 224 and second electrode 212, to load quiescent operation voltage, under the condition of the electric field strength of certain intensity of guaranteeing positive work of phosphor powder layer 26, can be when adopting the DC driven power supply required driving voltage is littler.
In addition, the AC field change frequency is high more, and the electric charge that has little time to redistribute is just many more, and they can constantly redistribute in the medium of two charged pole plates; Frequency is high more, and electric field strength is also the highest.Obviously the operating frequency of high-frequency ac power is higher for well, but generally under the situation, the operating frequency of this high-frequency ac power U2 preferably is selected between 100MHz～1GHz, because frequency is selected to such an extent that too lowly easily other circuit is caused interference; And if frequency is selected De Taigao, switching is not easy to control to signal, and is easy to generate leakage radiation, and (Electromagnetic Compatibility, EMC) problem also is difficult to handle the battery compatibility.
Seeing also Fig. 4, is the structural representation of electroluminescent display second execution mode of the present invention.This electroluminescent display 3 comprises and is oppositely arranged and has one at least for transparent first substrate 31 and second substrate 32, and is arranged on the phosphor powder layer 36 between this first substrate and second substrate.This electroluminescent display 3 comprises a plurality of luminescence units, for example: red light-emitting unit, green luminescence unit and blue light emitting unit.In each luminescence unit, that first substrate 31 comprises first substrate 310 that is oppositely arranged and first insulating barrier 315 and space and be arranged on second electrode 312 and third electrode 314 between this first substrate 310 and first insulating barrier 315, second substrate 32 comprises second substrate of glass 320, first electrode 324 and second insulating barrier 325 that is cascading, and this first insulating barrier 315 and second insulating barrier 325 all are close to phosphor powder layer 36 and are provided with.This phosphor powder layer 36 is a blue light emitting phosphor layer.Second substrate 32 is a transparency carrier, and this electroluminescent display 3 also comprises the coloured light phosphor powder layer 38 that is arranged between first electrode 324 and first substrate of glass 320.This coloured light phosphor powder layer 38 comprises red light fluorescent powder unit 381, green light fluorescent powder unit 382 and the blue light fluorescent powder unit 383 that corresponds respectively to red light-emitting unit, green luminescence unit and blue light emitting unit.
See also Fig. 5, this electroluminescent display 3 also comprises DC driven power supply U1 and high-frequency ac power U2, in each luminescence unit, this second electrode 312 is electrically connected to the negative pole of this DC driven power supply U1 and the output stage of high-frequency ac power U2, third electrode 314 is connected with the positive electrical of DC driven power supply U1, and first electrode 324 is electrically connected with another output stage of high-frequency ac power U2.DC driven power supply U1 is load driver voltage between the third electrode 314 and second electrode 312, and high-frequency ac power U2 loads quiescent operation voltage between first electrode 324 and second electrode 312.
During work, phosphor powder layer 36 is between the third electrode 314 and second electrode 312 in the AC field of formation between the DC electric field that forms and first electrode 324 and second electrode 312.Because this phosphor powder layer 36 is a blue phosphor layer, and blue phosphor generally is the mixture of multiple material, because blue light is in spectral sequence, the most close with the spectrum of ultraviolet, so, in electroluminescent, this phosphor powder layer 36 also can send a large amount of ultraviolets simultaneously except sending blue ray.Fluorescent material is except can be with electroluminescent method luminous, and it is luminous that ultraviolet ray also can excitated fluorescent powder, because ultraviolet ray also is the shorter alternating electromagnetic field of a kind of wavelength.Therefore, during these electroluminescent display 3 work, though this red light fluorescent powder unit 381, green light fluorescent powder unit 382 and blue light fluorescent powder unit 383 are not excited by electric field, but this red light fluorescent powder unit 381, green light fluorescent powder unit 382 and blue light fluorescent powder unit 383 still can be by ultraviolet ray excited and luminous, and then realize showing.If the light that this red light fluorescent powder unit 381, green light fluorescent powder unit 382 and blue light fluorescent powder unit 383 are sent is impure thoroughly, can also between the coloured light phosphor powder layer 38 and second substrate of glass 320, colored filter be set and filters.
And, for fear of the secondary excitation blue light fluorescent powder, can all fill transparency material in the blue light fluorescent powder unit 383 in the coloured light phosphor powder layer 38, the blue light that allows phosphor powder layer 36 be sent directly sees through.Certainly, also can fill blue light fluorescent powder in the blue light fluorescent powder unit 383, the blue light that allows phosphor powder layer 36 be sent excites blue light fluorescent powder luminous once more.
Can adopt the principle of less driving voltage similar to the electroluminescent display 2 of first execution mode, electroluminescent display 3 in the present embodiment can adopt less driving voltage to come the blue colour fluorescent powder in the fluorescence excitation bisque 36 to send ultraviolet ray and then excite this red light fluorescent powder unit 381, green light fluorescent powder unit 382 and blue light fluorescent powder unit 383 luminous equally, thereby realizes colored the demonstration.
In addition, in the present embodiment, only need to adopt electric field to excite blue light fluorescent powder luminous, and in first execution mode, need to adopt electric field to excite red light fluorescent powder, green light fluorescent powder and blue light fluorescent powder luminous respectively.And the luminous intensity of different fluorescent material is all different with the corresponding relation of electric field strength, therefore, compares with first execution mode, and present embodiment is more simple in circuit and control.
In the above-mentioned execution mode, high-frequency ac power U2 can adopt traveling-wave power amplifier circuit as shown in Figure 6.This traveling-wave power amplifier circuit comprises high-frequency generator 400 and 4 grades of amplifier units.Every grade of amplifier unit comprises amplifier 410, phase-shift circuit 420,430 and input resistance 440, phase-shift circuit 430 and the input that is connected to amplifier 410 after input resistance 440 is connected, the output of amplifier 410 is connected to the input of the amplifier 410 of next stage amplifier unit through being connected to the output of the amplifier 410 of next stage amplifier unit behind the phase-shift circuit 420 behind the input resistance 440 of the other end of phase-shift circuit 430 through the next stage amplifier unit.High-frequency generator 400 output signals are delivered to the input resistance 440 of chopped-off head amplifier unit simultaneously and are imported phase-shift circuit 430 with subordinate.The capable wave power amplifying circuit of only forming with 4 grades of amplifiers among Fig. 6 is illustrated, therefore, its power output equals 4 grades of amplifier power output sums substantially, and the power output size depends on the progression of traveling-wave power amplifier fully like this, and this is to adjusting power output easily.
Row wave power amplifying circuit is except final amplifier, the output signal of every grade of amplifier equally also will be carried out phase shift through phase-shift circuit, make the phase place of the phase place of upper level amplifier output signal and next stage output signal identical, so just can carry out voltage or power addition; When the delay time of every grade of amplifier input circuit and output circuit signal or phase place equated fully, after the addition, gross output just can equal amplifier power output sums at different levels to all output signals at different levels one by one.The operating efficiency of this travelling-wave amplifier is generally all very high, because phase-shift circuit is exactly general delay line circuit, this delay line circuit substantially all is made up of inductance and electric capacity or distributed inductance and distributed capacitance, and therefore this delay line circuit loss is very little.
High-frequency generator 400 is general to adopt high frequency transistor or field effect transistor or integrated circuit modules, but at present can power output tens watts high-power high-frequency transistor or field effect transistor also seldom, perhaps price is very expensive.Therefore, can make up, constitute the one group of high power amplifier that can export high frequency with a plurality of low-power amplifiers.But must consider the phase problem of amplifiers at different levels when designing the high power amplifier of multistage high frequency, such as the phase difference between next stage input signal and the upper level amplifier input signal, the perhaps phase difference problem between the output signal.If the phase difference between the dual-stage amplifier output signal is 30 degree, power output so at the corresponding levels will lose 25%; If phase difference is 60 degree, power output at the corresponding levels will lose 75%.And, its phase shift 30 degree for the signal of 1GHz frequency, and only needing in printed board, walk the circuit of 15 millimeters distances more, other circuit effects of distribution parameters around this is not also considered is for double-clad board or multilayer printed board, apart from also shorter.
It is described that electroluminescent display of the present invention is not limited to above-mentioned execution mode, for example: in electroluminescent display 4, first substrate 310 can be substrate of glass or other substrate, but need be not transparent, therefore can print various circuit in the above, and second substrate 320 must be transparent.Because under same energy excitation, the luminous intensity of every kind of fluorescent material is not the same, the inconsistency of this luminous intensity can solve by the size that changes the fluorescent material area, be that the little fluorescent material area of luminous intensity can be greatly, the fluorescent material area that luminous intensity is big then can be smaller; Third electrode 214,314 in the electroluminescent display 2 and 3 is more little with distance between corresponding second electrode 212,312, under certain driving voltage situation, transverse electric field intensity between two electrodes is just big more, and longitudinal electric field intensity also can correspondingly increase, therefore third electrode 214,314 and the distance between corresponding second electrode 212,312 generally have only several microns of zero points or several microns, when carrying out circuit structure design, to consider the effect of transverse electric field, i.e. fluorescent material two gaps between electrodes of will trying one's best as far as possible; In order to improve the brightness and contrast of electroluminescent display 2 and 3, and good brightness Linear Control performance, not only need drive voltage amplitude is controlled, but also will also will control the pulse duration of driving voltage etc.
Claims (9)
1. electroluminescent display, comprise a plurality of luminescence units, include a luminescence medium layer in each luminescence unit, one side of luminescence medium layer is provided with first electrode, opposite side is provided with second electrode, it is characterized in that: the same side at second electrode also is arranged at intervals with third electrode, described electroluminescent display also comprises DC driven power supply U1 and high-frequency ac power U2, second electrode is electrically connected to the negative pole of DC driven power supply U1 and the output stage of high-frequency ac power U2, third electrode is connected with the positive electrical of DC driven power supply U1, first electrode is electrically connected with another output stage of high-frequency ac power U2, and the operating frequency of described high-frequency ac power U2 is 100MHz to 1GHz.
2. electroluminescent display as claimed in claim 1, it is characterized in that: described AC power adopts the traveling-wave power amplifier circuit, it comprises high-frequency generator and casacade multi-amplifier unit, and every grade of amplifier unit comprises amplifier and two phase-shift circuits that are connected with output with amplifier in respectively.
3. electroluminescent display as claimed in claim 2 is characterized in that: described high-frequency generator is high frequency transistor or field effect transistor or integrated circuit modules.
4. electroluminescent display as claimed in claim 1 is characterized in that: described luminescence medium layer comprises the first coloured light fluorescent material unit, the second coloured light fluorescent material unit, the 3rd coloured light fluorescent material unit.
5. electroluminescent display as claimed in claim 4 is characterized in that: the first coloured light fluorescent material unit, the second coloured light fluorescent material unit, the 3rd coloured light fluorescent material unit are respectively red light fluorescent powder unit, green light fluorescent powder unit and blue light fluorescent powder unit.
6. electroluminescent display as claimed in claim 1 is characterized in that: described luminescence medium layer is a blue light emitting phosphor layer.
7. electroluminescent display as claimed in claim 6 is characterized in that: described electroluminescent display also comprises the transparent substrates that is oppositely arranged with first electrode, is provided with the coloured light phosphor powder layer between this transparent substrates and first electrode.
8. electroluminescent display as claimed in claim 7 is characterized in that: described coloured light phosphor powder layer comprises red light fluorescent powder unit, green light fluorescent powder unit and blue light fluorescent powder unit.
9. electroluminescent display as claimed in claim 8 is characterized in that: described electroluminescent display also comprises the colored filter that is arranged between this coloured light phosphor powder layer and the transparent substrates.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100343261A CN1835180B (en) | 2006-03-11 | 2006-03-11 | Electroluminance display |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100343261A CN1835180B (en) | 2006-03-11 | 2006-03-11 | Electroluminance display |
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| CN1835180A CN1835180A (en) | 2006-09-20 |
| CN1835180B true CN1835180B (en) | 2011-09-28 |
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| CN2006100343261A Expired - Fee Related CN1835180B (en) | 2006-03-11 | 2006-03-11 | Electroluminance display |
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| CN110243504B (en) * | 2019-06-29 | 2021-06-15 | 上海中航光电子有限公司 | Pressure sensing device, driving method and manufacturing method of pressure sensing device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6140766A (en) * | 1997-12-27 | 2000-10-31 | Hokuriku Electric Industry Co., Ltd. | Organic EL device |
| CN1513280A (en) * | 2001-06-08 | 2004-07-14 | Three-terminal organic electroluminescent device | |
| CN1556665A (en) * | 2004-01-08 | 2004-12-22 | 北京交通大学 | Color-changing electroluminescence screen of a single organic material |
-
2006
- 2006-03-11 CN CN2006100343261A patent/CN1835180B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6140766A (en) * | 1997-12-27 | 2000-10-31 | Hokuriku Electric Industry Co., Ltd. | Organic EL device |
| CN1513280A (en) * | 2001-06-08 | 2004-07-14 | Three-terminal organic electroluminescent device | |
| CN1556665A (en) * | 2004-01-08 | 2004-12-22 | 北京交通大学 | Color-changing electroluminescence screen of a single organic material |
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| CN1835180A (en) | 2006-09-20 |
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