CN104409041A - Active organic light emitting display and driving circuit thereof - Google Patents
Active organic light emitting display and driving circuit thereof Download PDFInfo
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- CN104409041A CN104409041A CN201410722913.4A CN201410722913A CN104409041A CN 104409041 A CN104409041 A CN 104409041A CN 201410722913 A CN201410722913 A CN 201410722913A CN 104409041 A CN104409041 A CN 104409041A
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- active organic
- driving circuit
- display device
- organic electroluminescent
- electroluminescent display
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Abstract
The invention provides an active organic light emitting display and a driving circuit thereof. The active organic light emitting display comprises a pixel array, a data driver and a scanning driver, wherein the pixel array is formed by connecting a plurality of pixel units according to a standard RGB (red, green and blue) arrangement mode; the pixel units are connected with the data driver and the scanning driver through a plurality of data wires and a plurality of scanning wires; the active organic light emitting display further comprises a buffer and a switch unit; the buffer is connected with the data driver and the data wires; the buffer is not arranged on a driving chip in the data driver, so that the area of the driving chip is decreased, the cost of the driving chip is lowered, and the cost of the whole active organic light emitting display is lowered; the switch unit is connected with the pixel units and is arranged in the driving circuit, so that a switch connected with an external power supply is eliminated, and the aim of lowering the cost of the active organic light emitting display is fulfilled; meanwhile, the integration degree of a product is also improved.
Description
Technical field
The present invention relates to flat display field, be specifically related to a kind of active organic electroluminescent display device and driving circuit thereof.
Background technology
Active organic electroluminescent display device part (AMOLED) is active illuminating device.Compare present main flow flat panel display Thin Film Transistor-LCD (TFT-LCD), displayer has the advantages such as high-contrast, wide viewing angle, low-power consumption, thickness is thinner.
In AMOLED panel, the data-signal of image element circuit is provided by driving chip; Fig. 1 is the driving circuit schematic diagram of traditional active organic electroluminescent display device, and it comprises data driver, scanner driver, pixel etc.Under normal circumstances, as shown in Figure 1, a row pixel needs a data line, and m row pixel then needs m data line.Because the cost of driving chip is higher, and the area of its cost and driving chip is proportional relation, too much data line can take more chip area, thus improve the cost of driving chip, so the structure of a lot of company's meeting usage data signal multiplexing (Mux/Demux) reduces the quantity of data line, thus reduce the area of driving chip, or adopt integrated scanning driver to save driving chip, reduce the cost of driving chip with this, thus reduce the cost of whole AMOLED display system.
Digital drive technology, adopts subfield to drive, is by time mixing color method, realizes the display of various color.Generally a width television image is divided into 8 to show, the displaying time of these 8 pictures is different, be respectively 1T, 2T, 4T, 8T, 16,32T, 64T, 128T.Due to the eye storage characteristic of human eye, human eye is not only relevant with the brightness of this point also relevant with its fluorescent lifetime length to the sensation of certain some brightness, therefore in time a display cycle can be divided into several time segments, the time segment number shown in one cycle by switch control rule display unit realizes gray level.
And digital drive technology is applied in AMOLED driving circuit, need to carry out time switch to external power source, realized by MOSFET (Metal-Oxide-Semicondutor FieldEffect Transistor, the metal oxide semiconductor field-effect light) switch connected on the power line.Digital drive technology, needs data line AMOLED being shielded to body inside to carry out high speed write, needs to arrange impact damper in driving chip inside, be connected to AMOLED and shield on the data line of body inside, carry out charging and discharging at a high speed to data line.But because buffer requires comparatively large for output current, it is comparatively large that impact damper area occupies driving chip area ratio, adds the total cost of driving chip.
Summary of the invention
The object of the present invention is to provide a kind of active organic electroluminescent display device and driving circuit thereof, its impact damper is arranged at driving circuit inside, decreases the area of driving chip, reduces the cost of driving chip, thus reduces the cost of whole AMOLED display system.
For achieving the above object, the invention provides a kind of driving circuit of active organic electroluminescent display device: comprise pel array, data driver and scanner driver, described pel array is connected to form according to standard RGB arrangement mode by multiple pixel cell, and described pixel cell is connected with described data driver and scanner driver with sweep trace by a plurality of data lines; Also comprise impact damper and switch element, described impact damper is connected with described data driver and data line, and described switch element is connected with described pixel cell.
Optionally, the input end of described impact damper connects the output terminal of described data driver, the output terminal connection data line of described impact damper.
Optionally, every bar data line is all connected with described impact damper.
Optionally, described impact damper is a phase inverter or is formed by connecting by multiple phase inverter.
Optionally, all pixel cells are all connected to same switch element.
Optionally, described switch element is metal oxide semiconductor field effect tube.
Optionally, the drain electrode of described switch element is connected to described pixel cell, and source electrode is connected to external power source ELVDD, and grid is connected to PWR signal.
Optionally, described external power source ELVDD and described PWR signal are controlled by the drive system of outside.
Accordingly, the present invention also provides a kind of active organic electroluminescent display device, comprises the driving circuit of above-mentioned active organic electroluminescent display device.
Compared with prior art, in the driving circuit of active organic electroluminescent display device provided by the invention, data driver is connected with impact damper, impact damper is connected with data line, thus avoid the driving chip in data driver arranges impact damper, decrease the area of driving chip, reduce the cost of driving chip, thus reduce the cost of whole active organic electroluminescent display device; And switch element is connected with pixel cell, be arranged in driving circuit, save the switch be connected with external power source, also reach the object of the cost reducing active organic electroluminescent display device; Impact damper and switch element are arranged in driving circuit the integrated level also improving product simultaneously.
Accompanying drawing explanation
Fig. 1 is the driving circuit schematic diagram of traditional active organic electroluminescent display device.
The driving circuit schematic diagram of the active organic electroluminescent display device that Fig. 2 provides for one embodiment of the invention.
Embodiment
For making content of the present invention clearly understandable, below in conjunction with Figure of description, content of the present invention is described further.Certain the present invention is not limited to this specific embodiment, and the general replacement known by those skilled in the art is also encompassed in protection scope of the present invention.
Secondly, the present invention's detailed statement that utilized schematic diagram to carry out, when describing example of the present invention in detail, for convenience of explanation, schematic diagram, should to this as restriction of the present invention not according to general ratio partial enlargement.
Core concept of the present invention is: on data driver, be connected with impact damper, impact damper is connected with data line, thus avoid the driving chip in data driver arranges impact damper, decrease the area of driving chip, reduce the cost of driving chip, thus reduce the cost of whole active organic electroluminescent display device; Switch element is connected with pixel cell, is arranged in driving circuit, save the switch be connected with external power source, also reach the object of the cost reducing active organic electroluminescent display device; Impact damper and switch element are arranged in driving circuit the integrated level also improving product simultaneously.
Please refer to Fig. 2, the driving circuit schematic diagram of its active organic electroluminescent display device provided for one embodiment of the invention.As shown in Figure 2, the driving circuit of described active organic electroluminescent display device comprises pel array, data driver 10 and scanner driver 20, described pel array is connected to form according to standard RGB arrangement mode by multiple pixel cell 30, described pixel cell 30 by a plurality of data lines (D1, D2 ..., Dm) be connected with described data driver 10, by multi-strip scanning line (S00, S10 ..., Sn0) be connected with described scanner driver 20; The driving circuit of described active organic electroluminescent display device also comprises impact damper 40 and switch element 50, wherein, described impact damper 40 is connected with described data driver 10 and data line, and namely one end of described impact damper 40 connects described data driver 10, other end connection data line; Described switch element 50 is connected with described pixel cell 30.
The input end of described impact damper 40 connects the output terminal of described data driver 10, the output terminal connection data line of described impact damper 40, in the present embodiment, every bar data line is all connected with described impact damper 40, namely all data line D1, D2 ..., Dm is connected to impact damper 40, the quantity of impact damper 40 is consistent with the quantity of data line.Described impact damper 40 can be a phase inverter, also can be formed by connecting by organizing phase inverter more.Described impact damper 40 is connected with described data driver 10 and data line respectively, to reach the object of data line being carried out to charging and discharging at a high speed, high-speed data write is carried out to data line, do not take the space of data driver 10 simultaneously, save the area of driving chip in described data driver 10, save the cost of driving chip.
All pixel cells 30 are all connected to same switch element 50, described switch element 50 is metal oxide semiconductor field effect tube, its drain electrode is connected to described pixel cell 30, source electrode is connected to external power source ELVDD, grid is connected to PWR signal, and wherein said external power source ELVDD and described PWR signal have outside drive system to control.The Push And Release of external power source is controlled by described switch element 50, thus in replacement prior art, be arranged at the switch that external circuit is connected with external power source, improve the integrated level of active organic electroluminescent display device, simultaneously because switch element is arranged on driving circuit, can avoid being subject to the damage that ectocine causes, can production cost be reduced to a certain extent.
It should be noted that, described impact damper 40 and switch element 50 are all arranged in the non-display area of driving circuit, can not impact the aperture opening ratio etc. of viewing area and pixel.And, impact damper 40 is arranged in the driving circuit, its input end is connected with described data driver 10, output terminal is connected with data line, charging and discharging at a high speed can be carried out to data line, while data line being carried out to high speed write, avoid the area occupying driving chip in data driver 10, decrease the area of driving chip in data driver, reduce the cost of driving chip, thus reduce the cost of whole active organic electroluminescent display device, improve the integrated level of active organic electroluminescent display device simultaneously; All pixel cells 30 are all connected to switch element 50, the Kai Heguan to external power source can be realized, and switch need not be set in external circuit again, while improving active organic electroluminescent display device integrated level, also reduce the cost of active organic electroluminescent display device.
Accordingly, the present invention also provides a kind of active organic electroluminescent display device, comprises the driving circuit of above-mentioned active organic electroluminescent display device.
In sum, in the driving circuit of active organic electroluminescent display device provided by the invention, data driver is connected with impact damper, impact damper is connected with data line, thus avoid the driving chip in data driver arranges impact damper, decrease the area of driving chip, reduce the cost of driving chip, thus reduce the cost of whole active organic electroluminescent display device; And switch element is connected with pixel cell, be arranged in driving circuit, save the switch be connected with external power source, also reach the object of the cost reducing active organic electroluminescent display device; Impact damper and switch element are arranged in driving circuit the integrated level also improving product simultaneously.
Foregoing description is only the description to present pre-ferred embodiments, any restriction not to the scope of the invention, and any change that the those of ordinary skill in field of the present invention does according to above-mentioned disclosure, modification, all belong to the protection domain of claims.
Claims (9)
1. the driving circuit of an active organic electroluminescent display device, comprise pel array, data driver and scanner driver, described pel array is connected to form according to standard RGB arrangement mode by multiple pixel cell, described pixel cell is connected with described data driver and scanner driver with sweep trace by data line, it is characterized in that, also comprise impact damper and switch element, described impact damper is connected with described data driver and data line, and described switch element is connected with described pixel cell.
2. the driving circuit of active organic electroluminescent display device as claimed in claim 1, it is characterized in that, the input end of described impact damper connects the output terminal of described data driver, the output terminal connection data line of described impact damper.
3. the driving circuit of active organic electroluminescent display device as claimed in claim 2, is characterized in that, every bar data line is all connected with described impact damper.
4. the driving circuit of active organic electroluminescent display device as claimed in claim 3, it is characterized in that, described impact damper is a phase inverter or is formed by connecting by multiple phase inverter.
5. the driving circuit of active organic electroluminescent display device as claimed in claim 1, it is characterized in that, all pixel cells are all connected to same switch element.
6. the driving circuit of active organic electroluminescent display device as claimed in claim 5, it is characterized in that, described switch element is metal oxide semiconductor field effect tube.
7. the driving circuit of active organic electroluminescent display device as claimed in claim 6, it is characterized in that, the drain electrode of described switch element is connected to described pixel cell, and source electrode is connected to external power source ELVDD, and grid is connected to PWR signal.
8. the driving circuit of active organic electroluminescent display device as claimed in claim 7, it is characterized in that, described external power source ELVDD and described PWR signal are controlled by the drive system of outside.
9. an active organic electroluminescent display device, is characterized in that, comprises the driving circuit as the active organic electroluminescent display device in claim 1 ~ 8 as described in any one.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410722913.4A CN104409041A (en) | 2014-12-02 | 2014-12-02 | Active organic light emitting display and driving circuit thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410722913.4A CN104409041A (en) | 2014-12-02 | 2014-12-02 | Active organic light emitting display and driving circuit thereof |
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| CN104409041A true CN104409041A (en) | 2015-03-11 |
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| CN201410722913.4A Pending CN104409041A (en) | 2014-12-02 | 2014-12-02 | Active organic light emitting display and driving circuit thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109920375A (en) * | 2017-12-12 | 2019-06-21 | 乐金显示有限公司 | Micro display device and display integrated circuit |
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| CN1540613A (en) * | 2003-04-25 | 2004-10-27 | 精工爱普生株式会社 | Electrooptical device, drive method of electrooptical device and electronic instrument |
| US20050134536A1 (en) * | 2003-12-22 | 2005-06-23 | Shin-Tai Lo | Driving apparatus for an active matrix organic light emitting display |
| CN1755781A (en) * | 2004-09-29 | 2006-04-05 | 精工爱普生株式会社 | Pixel circuit, light-emitting device, and image forming apparatus |
| CN1870113A (en) * | 2006-06-27 | 2006-11-29 | 广辉电子股份有限公司 | Structure of display picture element circuit and its driving method |
| CN102436790A (en) * | 2011-03-23 | 2012-05-02 | 友达光电股份有限公司 | Active matrix electroluminescent display device and its driving method |
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2014
- 2014-12-02 CN CN201410722913.4A patent/CN104409041A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1540613A (en) * | 2003-04-25 | 2004-10-27 | 精工爱普生株式会社 | Electrooptical device, drive method of electrooptical device and electronic instrument |
| US20050134536A1 (en) * | 2003-12-22 | 2005-06-23 | Shin-Tai Lo | Driving apparatus for an active matrix organic light emitting display |
| CN1755781A (en) * | 2004-09-29 | 2006-04-05 | 精工爱普生株式会社 | Pixel circuit, light-emitting device, and image forming apparatus |
| CN1870113A (en) * | 2006-06-27 | 2006-11-29 | 广辉电子股份有限公司 | Structure of display picture element circuit and its driving method |
| CN102436790A (en) * | 2011-03-23 | 2012-05-02 | 友达光电股份有限公司 | Active matrix electroluminescent display device and its driving method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109920375A (en) * | 2017-12-12 | 2019-06-21 | 乐金显示有限公司 | Micro display device and display integrated circuit |
| CN109920375B (en) * | 2017-12-12 | 2022-03-18 | 乐金显示有限公司 | Micro display device and display integrated circuit |
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Application publication date: 20150311 |
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