CN100377387C - Electronic device with organic electroluminescence display - Google Patents
Electronic device with organic electroluminescence display Download PDFInfo
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- CN100377387C CN100377387C CNB2005100747275A CN200510074727A CN100377387C CN 100377387 C CN100377387 C CN 100377387C CN B2005100747275 A CNB2005100747275 A CN B2005100747275A CN 200510074727 A CN200510074727 A CN 200510074727A CN 100377387 C CN100377387 C CN 100377387C
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Abstract
The present invention relates to an electronic device with an organic electroluminescent display, which comprises a DC voltage converter, an organic electroluminescent display and at least one executive unit, wherein the DC voltage converter is used for converting the first DC voltage into the second DC voltage, the organic electroluminescent display is used for receiving the first DC voltage, and the executive unit is used for receiving the second DC voltage to execute the system functions of the electronic device.
Description
Technical field
The present invention relates to a kind of electronic installation, and particularly relate to a kind of electronic installation with display of organic electroluminescence with display.
Background technology
Display of organic electroluminescence (Organic Electro-Luminescence Display, OELD), maximum characteristic is that it is a self-luminous body, therefore do not need backlight (Backlight) and colored filter structures such as (Color Filter), therefore can (Liquid Crystal Display, thickness LCD) be thinner than LCD.Advantages such as broader in addition visual angle, reaction speed are fast, low driving voltage, color and contrast also compare the LCD height, more low power consumption and manufacturing process be simpler make organic electro-luminescent display become the Display Technique that is expected most after LCD.
Figure 1A shows a kind of traditional have display of organic electroluminescence (OrganicElectro-Luminescence Display, the calcspar of electronic installation OELD).Electronic installation 10 comprises dc voltage changer (DC to DC converter) 120, display dc voltage changer 130, display of organic electroluminescence 170 and at least one performance element (among Figure 1A be example explanation with first performance element 140, second performance element 150 and the 3rd performance element 160).Electronic installation 10 provides first direct voltage to supply with its electricity needs by an external power source 110.Dc voltage changer 120 is in order to being converted to second direct voltage with first direct voltage, and with the working power of second direct voltage as first performance element 140, second performance element 150 and the 3rd performance element 160.First performance element 140, second performance element 150 and the 3rd performance element 160 are received from second direct voltage of dc voltage changer 120 outputs to carry out the systemic-function of electronic installation 10.Display dc voltage changer 130 is in order to be converted to the 3rd direct voltage with first direct voltage.Display of organic electroluminescence 170 receives the 3rd direct voltage to carry out Presentation Function.
Figure 1B shows the calcspar of the traditional electronic installation with display of organic electroluminescence of another kind.Electronic installation 20 is that with aforementioned electronic 10 differences display dc voltage changer 130 is not first direct voltage that directly receives external power source 110 outputs, but nationality is converted to second direct voltage with first direct voltage earlier by dc voltage changer 120, and display dc voltage changer 130 exports display of organic electroluminescence 170 to carry out Presentation Function after its second direct voltage being converted to the 3rd direct voltage again.
Yet, use not only its cost height of display dc voltage changer 130, and the space in its occupied electronic installation makes available space diminish more relatively, cause the degree of difficulty of printed circuit board wiring to improve, cause easily simultaneously electromagnetic interference effect (Electro Magnetic Interference, EMI).Moreover, the conversion of power supply also can cause the decay on the electric power energy efficiency, and causes the increase of power consumption.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of electronic installation, by the improvement of manufacturing process and design, or change driving voltage, to reach the purpose of the number that reduces dc voltage changer with display of organic electroluminescence.
According to purpose of the present invention, a kind of electronic installation with display of organic electroluminescence is proposed, comprise dc voltage changer, display of organic electroluminescence and performance element.Dc voltage changer is in order to be converted to second direct voltage with first direct voltage.Execution units receives second direct voltage, to carry out the systemic-function of electronic installation.Display of organic electroluminescence is in order to receive first direct voltage.
According to second purpose of the present invention, a kind of electronic installation with display of organic electroluminescence is proposed, comprise dc voltage changer, display of organic electroluminescence and performance element.Dc voltage changer is in order to be converted to second direct voltage with first direct voltage.Display of organic electroluminescence is in order to receive second direct voltage.Execution units receives second direct voltage, to carry out the systemic-function of electronic installation.
According to the 3rd purpose of the present invention, a kind of electronic installation with display of organic electroluminescence is proposed, comprise dc voltage changer, display of organic electroluminescence and performance element.Dc voltage changer is in order to be converted to second direct voltage with first direct voltage.Execution units receives second direct voltage, to carry out the systemic-function of electronic installation.The passive component voltage conversion unit is in order to be converted to the 3rd direct voltage with first direct voltage.Display of organic electroluminescence is in order to receive the 3rd direct voltage.
According to the 4th purpose of the present invention, a kind of electronic installation with display of organic electroluminescence is proposed, comprise dc voltage changer, display of organic electroluminescence and performance element.Dc voltage changer is in order to be converted to second direct voltage with first direct voltage.Execution units receives second direct voltage, to carry out the systemic-function of electronic installation.The passive component voltage conversion unit is in order to be converted to the 3rd direct voltage with second direct voltage.Display of organic electroluminescence is in order to receive the 3rd direct voltage.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and be described with reference to the accompanying drawings as follows.
Description of drawings
Figure 1A shows the calcspar that has the electronic installation of display of organic electroluminescence for tradition is a kind of.
Figure 1B shows the calcspar that has the electronic installation of display of organic electroluminescence for traditional another kind.
Fig. 2 shows a kind of calcspar with electronic installation of display of organic electroluminescence according to the present invention one first embodiment.
Fig. 3 shows a kind of calcspar with electronic installation of display of organic electroluminescence according to the present invention one second embodiment.
Fig. 4 shows a kind of calcspar with electronic installation of display of organic electroluminescence according to the present invention 1 the 3rd embodiment.
Fig. 5 shows a kind of calcspar with electronic installation of display of organic electroluminescence according to the present invention 1 the 4th embodiment.
Fig. 6 A shows according to the employed a kind of schematic diagram with display of organic electroluminescence of preferred embodiment of the present invention.
Fig. 6 B shows first kind of schematic diagram with pixel of display of organic electroluminescence according to preferred embodiment of the present invention.
Fig. 6 C shows second kind of schematic diagram with pixel of display of organic electroluminescence according to preferred embodiment of the present invention.
The reference numeral explanation
10,20: tradition has the electronic installation of display of organic electroluminescence
30,40,50,60: according to the electronic installation with display of organic electroluminescence of the present invention
110,210: external power source
120,220: dc voltage changer
130: the display dc voltage changer
430,530: the passive component voltage conversion unit
140,240: the first electronic installations
150,250: second electronic device
160,260: the three electronic installations
170,270,370,470,570: display of organic electroluminescence
271: data driver
272: pixel
276: transistor
276 (1): the P transistor npn npn
276 (2): the N transistor npn npn
277: organic electroluminescent LED
Embodiment
Embodiment one
Please refer to Fig. 2, it shows a kind of calcspar with electronic installation of display of organic electroluminescence according to the present invention one first embodiment.A kind of electronic installation 30 with display of organic electroluminescence, electronic installation 30 for example can be digital camera or mobile phone.Electronic installation 30 comprises dc voltage changer 220, at least one performance element (present embodiment is the example explanation with first performance element 240, second performance element 250 and the 3rd performance element 260) and display of organic electroluminescence 270.Electronic installation 30 provides first direct voltage to supply with its electricity needs by an external power source 210, and external power source 210 for example is the lithium battery in digital camera or the mobile phone.Display of organic electroluminescence 270 is in order to receive first direct voltage to carry out Presentation Function, display of organic electroluminescence 270 for example can be macromolecule organic light emitting diode display (Polymer Light-Emitting Diode Display, PLED) or be organic light emitting diode display (Organic Light-Emitting Diode Display, OLED).Dc voltage changer 220 is in order to be converted to second direct voltage with first direct voltage.First performance element 240, second performance element 250 and the 3rd performance element 260 are in order to receive second direct voltage, to carry out the systemic-function of electronic installation 30.Performance element for example can be flashlight driving circuit, image capture circuit or lens switch drive circuit in digital camera, according to the action of its functional purpose in order to flash of light action, image capture action or the controls lens switch of execution photoflash lamp.
Embodiment two
Please refer to Fig. 3, it shows a kind of calcspar with electronic installation of display of organic electroluminescence according to the present invention one second embodiment.Electronic installation 40 is with aforementioned electronic 30 differences, display of organic electroluminescence 370 is not first direct voltage that directly receives external power source 210 outputs, but earlier first direct voltage being converted to second direct voltage by dc voltage changer 320, display of organic electroluminescence 370 receives second direct voltage of dc voltage changer 320 outputs again to carry out its Presentation Function.
Embodiment three
Please refer to Fig. 4, it shows a kind of calcspar with electronic installation of display of organic electroluminescence according to the present invention 1 the 3rd embodiment.Electronic installation 50 is that with aforementioned electronic 30 differences electronic installation 50 has increased passive component voltage conversion unit 430 between external power source 210 and display of organic electroluminescence 470.Earlier first direct voltage is converted to the 3rd direct voltage by passive component voltage conversion unit 430, display of organic electroluminescence 470 receives the 3rd direct voltage of passive component voltage conversion unit 430 outputs again to carry out its Presentation Function.
Wherein, passive component voltage conversion unit 430 is different with dc voltage changer be in, passive component voltage conversion unit 430 only is made of passive component, is made of diode.By the drooping characteristic that uses diode itself, export the 3rd direct voltage after reducing by first direct voltage.Passive component is compared to display dc voltage changer 130, and not only volume is little for passive component, power consumption is low, and its cost price is especially far below display electric pressure converter 130.
Embodiment four
Please refer to Fig. 5, it shows a kind of calcspar with electronic installation of display of organic electroluminescence according to the present invention 1 the 4th embodiment.Electronic installation 60 is that with aforementioned electronic 40 differences electronic installation 60 has increased passive component voltage conversion unit 530 between dc voltage changer 220 and display of organic electroluminescence 570.Earlier second direct voltage of dc voltage changer 220 outputs is converted to the 3rd direct voltage by passive component voltage conversion unit 530, display of organic electroluminescence 570 receives the 3rd direct voltage of passive component voltage conversion unit 530 outputs again to carry out its Presentation Function.
The working power of the organic electro-luminescent display of the electronic installation of aforesaid four embodiment all can provide by dc voltage changer 220 or external power source 210, need not use display dc voltage changer 130.Below will do further introduction with regard to the method that electronic installation 30, electronic installation 40, electronic installation 50 and electronic installation 60 omit display dc voltage changer 130.
Please be simultaneously with reference to Fig. 6 A, Fig. 6 B and Fig. 6 C, Fig. 6 A shows according to the employed a kind of schematic diagram with display of organic electroluminescence of preferred embodiment of the present invention.Fig. 6 B shows first kind of schematic diagram with pixel of display of organic electroluminescence according to preferred embodiment of the present invention.Fig. 6 C shows second kind of schematic diagram with pixel of display of organic electroluminescence according to preferred embodiment of the present invention.Display of organic electroluminescence 270 comprises data driver 271 and a plurality of pixel 272.Data driver 270 is in order to output pixel voltage Vdata.Each pixel 272 comprises organic electroluminescent LED 277 and transistor 276, and transistor 276 can be P transistor npn npn 276 (1) or N transistor npn npn 276 (2).
When 276 desires of the transistor in the pixel 272 were used P transistor npn npn 276 (1), the negative terminal N of organic electroluminescent LED 277 was coupled to a low-voltage Vss, and low-voltage Vss can be a negative voltage.The source S of P transistor npn npn 276 (1) receives a direct current voltage Vdd, direct voltage Vdd is first direct voltage in electronic installation 30, it in the electronic installation 40 second direct voltage, in electronic installation 50 and electronic installation 60 is the 3rd direct voltage, the grid G of P transistor npn npn 276 (1) receives pixel voltage Vdata, and the drain D of P transistor npn npn 276 (1) and the anode P of organic electroluminescent LED 277 electrically connect.
Please refer to Fig. 6 C, when the transistor in the pixel 272 276 changes into when adopting N transistor npn npn 276 (2), the anode P of organic electroluminescent LED 277 is coupled to a direct current voltage Vee, the drain D of N transistor npn npn 276 (2) and the negative terminal N of organic electroluminescent LED 277 electrically connect, the grid of N transistor npn npn 276 (2) receives pixel voltage Vdata, and the source S of N transistor npn npn 276 (2) then is coupled to direct voltage Vdd.Wherein, no matter transistor 276 uses P transistor npn npn 276 (1) or N transistor npn npn 276 (2), it flows through the drive current of organic electroluminescent LED 277, with consistent with the drive current that flows through transistor 276 in fact.
The flow through brightness performance of drive current I decision display of organic electroluminescence 270 of organic electroluminescent LED 277, therefore when drive current I reaches rated current, Organic Light Emitting Diode 277 produces nominal brightness, rated current corresponds to a specified pixel voltage, when first direct voltage that provides when external power source 210 changes, present embodiment is by the channel width length ratio that changes transistor 276, make the grid G of transistor 276 when receiving specified pixel voltage, produce the electric current identical in fact with rated current.Therefore, when organic electroluminescent LED 277 being applied to Fig. 2 to display of organic electroluminescence 270 shown in Figure 5, only need to change the channel width length ratio of the organic electroluminescent LED 277 of Fig. 6 B, can make display of organic electroluminescence 270 produce the desired nominal brightness that reaches at the size of first direct voltage that is received or the 3rd direct voltage.So, need not use the display dc voltage changer 130 of Figure 1A or Figure 1B, can make display of organic electroluminescence 270 show needed brightness.
In addition, the type of drive that also can change organic electroluminescent LED 277 reaches the purpose of saving the display dc voltage changer of the present invention.Because the size of drive current I depends on the grid one source pole terminal voltage of transistor 276, so when the value of the Vdd that source S received changes, can be by the magnitude of voltage that changes grid G accordingly, that is be the size of pixel voltage Vdata, obtain the drive current I of identical size, and make organic electroluminescent LED 277 produce identical brightness.Suppose the grid-when source terminal voltage reaches first potential difference when transistor 276,276 corresponding drive current I that produce of transistor make the brightness maximum of organic electroluminescent LED 277.And when grid-when source terminal voltage reaches second potential difference, 276 corresponding drive current I that produce of transistor make the brightness minimum of organic electroluminescent LED 277.Therefore, present embodiment when the direct voltage Vdd of transistor 276 source terminal S changes, is controlled pixel voltage Vdata according to the variable quantity of direct voltage Vdd by data driver 271, so that pixel voltage Vdata produces identical in fact variable quantity.Keep simultaneously the first fixing potential difference and second potential difference in fact.Therefore, when organic electroluminescent LED 277 being applied to Fig. 2 to display of organic electroluminescence 270 shown in Figure 5, the value of the pixel voltage Vdata that the organic electroluminescent LED 277 that only needs size at first direct voltage that is received or the 3rd direct voltage change Fig. 6 B is received can make display of organic electroluminescence 270 produce the desired brightness that reaches.So, can reach the purpose of saving the display dc voltage changer.
The electronic installation with display of organic electroluminescence that the above embodiment of the present invention is disclosed, even use different external power sources, display of organic electroluminescence still has identical brightness performance.
Second advantage of the present invention is to reduce power consumption.The electronic installation of present embodiment does not need to use separately a group display equipment dc voltage changer, therefore can reduce the energy loss that the display dc voltage changer is caused when DC level is changed, particularly when electronic installation is digital camera or mobile phone, because its external power source is generally a lithium battery, can increase the service time of lithium battery in electronic installation relatively by the reduction of aforementioned power consumption.
The 3rd advantage of the present invention is to save the space.The display dc voltage changer accounts for 40 space of percentage in the electronic installation in the traditional electronic devices.Make that available relatively space tails off in the electronic installation, cause and put too approachingly between all the other electronic components, be easy to generate electromagnetic interference.For fear of the generation of electromagnetic interference effect, often need the extra screening arrangement (as iron covering) that increases.By the characteristics that need not use the display dc voltage changer of the foregoing description,, more can further solve the problem of electromagnetic interference except increasing the usage space in original electronic installation.
The 4th advantage of the present invention is to reduce production costs.The cost of one group display equipment dc voltage changer is higher.Need not use the characteristics of display dc voltage changer by this example, can reduce production costs, increase the market competitiveness.
In sum; though the present invention discloses as above with a preferred embodiment; right its is not in order to limit the present invention; those skilled in the art can be used for a variety of modifications and variations under the premise without departing from the spirit and scope of the present invention, so protection scope of the present invention is as the criterion with the application's claim.
Claims (9)
1. electronic installation comprises:
One direct current electric pressure converter is in order to be converted to one second direct voltage with one first direct voltage;
At least one performance element is in order to receive this second direct voltage, to carry out the systemic-function of this electronic installation;
One passive component voltage conversion unit is in order to be converted to one the 3rd direct voltage with this first direct voltage or this second direct voltage; And
One display of organic electroluminescence is in order to receive the 3rd direct voltage.
2. electronic installation as claimed in claim 1, wherein this first direct voltage system is provided by an external power source.
3. electronic installation as claimed in claim 1, wherein this display of organic electroluminescence is a macromolecule organic light emitting diode display.
4. electronic installation as claimed in claim 1, wherein this display of organic electroluminescence is an organic light emitting diode display.
5. electronic installation as claimed in claim 1, wherein this display of organic electroluminescence comprises a data driver and a plurality of pixel, and this data driver is in order to export a pixel voltage, and respectively this pixel comprises:
One organic electroluminescent LED, a negative terminal of this organic electroluminescent LED is coupled to a low-voltage; And
One P transistor npn npn, the one source pole of this P transistor npn npn receives the 3rd direct voltage, one grid of this P transistor npn npn receives this pixel voltage, one drain electrode of this P transistor npn npn electrically connects with an anode of this organic electroluminescent LED, at least have one first potential difference and one second potential difference between this source electrode of this P transistor npn npn and this grid, wherein this first potential difference results from this organic electroluminescent LED brightness when maximum, and this second potential difference results from this organic electroluminescent LED brightness hour;
Wherein, when the 3rd direct voltage changes, this data driver is controlled this pixel voltage according to the variable quantity of the 3rd direct voltage that changes, so that this pixel voltage produces identical in fact variable quantity, so that this first potential difference and this second potential difference are kept fixing in fact.
6. electronic installation as claimed in claim 1, wherein this display of organic electroluminescence comprises a plurality of pixels, respectively this pixel comprises:
One organic electroluminescent LED, an end of this organic electroluminescent LED is coupled to a negative voltage, and when a rated current was flowed through this organic electroluminescent LED, this organic electroluminescent LED produced a nominal brightness; And
One P transistor npn npn comprises:
One source pole receives the 3rd direct voltage;
One drain electrode is with the anode electric connection of this organic electroluminescent LED; And
One grid receives a pixel voltage, and this rated current corresponds to a specified pixel voltage;
Wherein, it is consistent with the electric current that flows through this P transistor npn npn in fact to flow through the electric current of this organic electroluminescent LED;
Wherein, when the 3rd direct voltage changes,, make this grid of this P transistor npn npn when receiving this specified pixel voltage, produce the electric current identical in fact with this rated current by the channel width length ratio that changes this P transistor npn npn.
7. electronic installation as claimed in claim 1, wherein this passive component voltage conversion unit is a passive component.
8. electronic installation as claimed in claim 1, wherein this display of organic electroluminescence comprises a data driver and a plurality of pixel, and this data driver is in order to export a pixel voltage, and respectively this pixel comprises:
One organic electroluminescent LED, an anode of this organic electroluminescent LED is coupled to a high voltage; And
One N transistor npn npn, one drain electrode of this N transistor npn npn electrically connects with a negative terminal of this organic electroluminescent LED, one grid of this N transistor npn npn receives this pixel voltage, the one source pole of this N transistor npn npn is coupled to the 3rd direct voltage, has one first potential difference and one second potential difference between this transistorized this source electrode and this grid at least;
Wherein, this first potential difference results from this organic electroluminescent LED brightness when maximum, and this second potential difference results from this organic electroluminescent LED brightness hour;
Wherein, when the 3rd direct voltage changes, this data driver is controlled this pixel voltage according to the variable quantity of the 3rd direct voltage, so that this pixel voltage produces identical in fact variable quantity, so that this first potential difference and this second potential difference are kept fixing in fact.
9. electronic installation as claimed in claim 1, wherein this display of organic electroluminescence comprises a plurality of pixels, respectively this pixel comprises:
One organic electroluminescent LED, an end of this organic electroluminescent LED is coupled to a high voltage, and when a rated current was flowed through this organic electroluminescent LED, this organic electroluminescent LED produced a nominal brightness; And
One N transistor npn npn comprises:
One source pole is coupled to the 3rd direct voltage;
One drain electrode is with the negative terminal electric connection of this organic electroluminescent LED; And
One grid receives a pixel voltage, and this rated current system corresponds to a specified pixel voltage;
Wherein, it is consistent with the electric current that flows through this N transistor npn npn in fact to flow through the electric current of this organic electroluminescent LED;
Wherein, when this first direct voltage changes,, make this grid of this N transistor npn npn when receiving this specified pixel voltage, produce the electric current identical in fact with this rated current by the channel width length ratio that changes this N transistor npn npn.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100747275A CN100377387C (en) | 2005-05-31 | 2005-05-31 | Electronic device with organic electroluminescence display |
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| CNB2005100747275A CN100377387C (en) | 2005-05-31 | 2005-05-31 | Electronic device with organic electroluminescence display |
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| CN1694588A CN1694588A (en) | 2005-11-09 |
| CN100377387C true CN100377387C (en) | 2008-03-26 |
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| CN102612224B (en) * | 2012-03-01 | 2015-09-23 | 杭州乐图光电科技有限公司 | A kind of MR16LED lamp drive circuit, driving method and apply its MR16LED lamp illuminating system |
| KR102510708B1 (en) | 2016-07-25 | 2023-03-16 | 삼성전자주식회사 | Electronic device and method for diplaying image |
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| CN1336629A (en) * | 2000-07-28 | 2002-02-20 | Lg电子株式会社 | Driving circuit used for organic electroluminescent device |
| CN1462025A (en) * | 2002-05-28 | 2003-12-17 | 友达光电股份有限公司 | Designing method of display driving circuit |
| CN1547184A (en) * | 2003-12-05 | 2004-11-17 | 友达光电股份有限公司 | LCD panel drive circuit and LCD |
| CN1588521A (en) * | 2004-09-08 | 2005-03-02 | 友达光电股份有限公司 | Organic light-emitting display and its display unit |
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2005
- 2005-05-31 CN CNB2005100747275A patent/CN100377387C/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1336629A (en) * | 2000-07-28 | 2002-02-20 | Lg电子株式会社 | Driving circuit used for organic electroluminescent device |
| CN1462025A (en) * | 2002-05-28 | 2003-12-17 | 友达光电股份有限公司 | Designing method of display driving circuit |
| CN1547184A (en) * | 2003-12-05 | 2004-11-17 | 友达光电股份有限公司 | LCD panel drive circuit and LCD |
| CN1588521A (en) * | 2004-09-08 | 2005-03-02 | 友达光电股份有限公司 | Organic light-emitting display and its display unit |
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