CN1332370C - Digital drive method and apparatus for active organic light-emitting diode display - Google Patents
Digital drive method and apparatus for active organic light-emitting diode display Download PDFInfo
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- CN1332370C CN1332370C CNB031018971A CN03101897A CN1332370C CN 1332370 C CN1332370 C CN 1332370C CN B031018971 A CNB031018971 A CN B031018971A CN 03101897 A CN03101897 A CN 03101897A CN 1332370 C CN1332370 C CN 1332370C
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- 229920001621 AMOLED Polymers 0.000 claims description 12
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- 239000003990 capacitor Substances 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 10
- 229910021417 amorphous silicon Inorganic materials 0.000 description 9
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000005224 laser annealing Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 241001270131 Agaricus moelleri Species 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The present invention relates to a digital driving method and a device for an active organic light emitting diode display. The device is mainly composed of a plurality of groups of pixel devices, an organic light emitting diode (OLED) of each pixel device adopts a common cathode grounding mode, and the magnitude of the electric potential of a power cord is controlled to realize a digital driving frame with separated program and display. When image data is input, the electric potential of the power cord is connected to a zero potential, and the organic light emitting diode can not emit light. When the image data is output, the electric potential of the power cord is connected to a positive electric potential, and the organic light emitting diode emits the light.
Description
Technical Field
The present invention relates to a digital driving method and device for an active matrix organic light emitting diode display, and more particularly, to a digital driving architecture for implementing write-in luminance separation by controlling the level of a power line potential.
Background
As known, the current technologies of TFT are divided into two types, namely amorphous silicon (a-Si TFT) and polycrystalline silicon (Poly-SiTFT), and the TFT-LCD is generally called amorphous silicon (a-Si TFT), and the current technologies are mature and are the mainstream products of LCD. The biggest difference between low temperature poly-silicon (LTPS TFT) and a-Si TFT is that the LTPS transistor needs to be further processed by laser annealing to convert the amorphous silicon thin film into a poly-silicon thin film layer, so that LTPS is ordered on the silicon crystal structure compared with a-Si TFT, and the electron conduction rate can be increased to 200cm 2/V-sec. The LTPS technology can make the element smaller, and the whole TFT element area is reduced by more than 50%; and an aperture ratio (aperture ratio) is improved, higher resolution can be manufactured compared with a-Si TFT under the same size, and power consumption is reduced; the drive module can be directly integrated on the Glass substrate (System on Glass) in design, and part of Driver IC can be integrated in the Glass substrate, so that the area and the number of elements required by a circuit board and the connecting line between the drive IC and a panel electrode are reduced, the material cost is reduced, meanwhile, the product damage caused by assembly can be avoided in the assembly process of a rear-section module, and the yield is improved so as to reduce the manufacturing cost; in addition, due to the use of the integrated Driver IC, the weight of the IC can be reduced, and other materials required for the rear-end assembly can be reduced, so that the overall weight can be greatly reduced. Because low temperature poly-silicon (LTPS TFT) has the advantages of power saving, high brightness, fine picture, light weight, thin and small number of contacts (less than 200 contacts, which is helpful for improving the yield), the a-Si TFT has more than 3842 contacts, and the like.
However, since the thin film transistors manufactured by the low temperature poly-silicon (LTPS) process have variations in characteristics, when the driving system uses ANALOG (ANALOG) modulation to express gray scales, the organic light emitting diodes of different pixels generate different currents to emit different intensities even though the same voltage signal is written because the Thin Film Transistors (TFTs) have different characteristics after being subjected to the laser annealing process. This phenomenon may cause the oled panel to display an Image with a wrong gray scale, which may seriously damage the Image Uniformity (Image Uniformity).
Disclosure of Invention
Therefore, the main objective of the present invention is to solve the above-mentioned conventional drawbacks and avoid the drawbacks, and the present invention utilizes a digital driving architecture for controlling the power line potential to achieve write-in and light-off.
In order to achieve the above object, the present invention provides a digital driving method and device for an active matrix organic light emitting diode display, which mainly comprises a plurality of pixel devices, wherein an Organic Light Emitting Diode (OLED) of each pixel device is grounded through a common cathode, and a digital driving architecture for writing a luminance separation (Program display separated) is implemented by controlling the level of the power line potential.
Drawings
The detailed contents and technical descriptions of the invention are described as follows in combination with the accompanying drawings:
fig. 1-1 is a schematic diagram of a single pixel device of an active matrix organic light emitting diode display according to a first embodiment of the invention.
Fig. 1-2 is a timing diagram of a drive voltage waveform of fig. 1-1.
Fig. 2-1 is a schematic view of a second embodiment of the present invention.
Fig. 2-2 is a timing diagram of a drive voltage waveform of fig. 2-1.
Fig. 3-1 is a schematic view of a third embodiment of the present invention.
Fig. 3-2 is a timing diagram of a drive voltage waveform of fig. 3-1.
Detailed Description
Referring to fig. 1-1 and 1-2, a schematic diagram of a single pixel device of an active matrix organic light emitting diode display according to a first embodiment of the present invention and a timing diagram of a driving voltage waveform of fig. 1-1 are shown. As shown in the figure: the invention relates to a digital driving method and device of an active organic light emitting diode display, which mainly comprises a plurality of groups of pixel (pixel) devices 10, wherein an Organic Light Emitting Diode (OLED)4 of each pixel device 10 adopts a common cathode grounding mode, a digital driving framework of writing luminous separation (Program display separated) is realized by controlling the potential of a power line 7, when image data is input, the potential of the power line 7 is connected to a zero potential (GND), so that the organic light emitting diode 4 cannot be lightened, and when the image data is output, the potential of the power line 7 is connected to a positive potential VH, so that the organic light emitting diode 4 is lightened.
To implement the above method, the pixel (pixel) device 10 of the present invention comprises: a switch unit 1, a driving unit 2, a storage unit 3 and an Organic Light Emitting Diode (OLED) 4; wherein,
the switch unit 1 can be a Thin Film Transistor (TFT) with P channel, two input ends 11, 12 of the switch unit 1 are respectively connected with a Scan Line (Scan Line)5 and a Data Line (Data Line) 6;
the driving unit 2, which may be a P-channel Thin Film Transistor (TFT), has an input terminal 21 connected to a power LINE (SUPPLY LINE)7, and another input terminal 22 connected to the output terminal 13 of the switching unit 1;
the storage unit 3 is composed of a capacitor, one end of the storage unit is grounded, and the other end of the storage unit is connected to the connection position of the output end 13 of the switch unit 1 and the input end 22 of the drive unit 2;
an input terminal 41 of the Organic Light Emitting Diode (OLED)4 is connected to the output terminal 23 of the driving unit 2, and an output terminal 42 of the Organic Light Emitting Diode (OLED)4 is grounded;
when the device scans image data, the potential of the power line 7 is connected to the zero potential GND, so that the organic light emitting diode 4 cannot be lightened, the switch unit 1 is in a conducting state, the image data enters the switch unit 1 from the data line 6 at the moment, is scanned by the scanning line 5 and then is stored in the storage unit 3 (namely, the storage unit is charged after the switch unit is conducted), if the image data is lightened, the zero voltage GND is stored in the storage unit 3, and if the image data is not lightened, the positive voltage VH is stored in the storage unit 3; the potential of the scan line during the scanning process is the zero potential GND, the potentials of the other scan lines are the positive potential VH, and after all the scanning operations are completed, the potential of the power line 7 is connected to the positive potential VH, so that the organic light emitting diode 4 of the pixel device 10 storing the zero voltage GND in the storage unit 3 is turned on.
Please refer to fig. 2-1 and 2-2, which are schematic diagrams of a second embodiment of the present invention and a timing diagram of a driving voltage waveform of fig. 2-1. As shown in the figure: the invention relates to a digital driving method and device of an active organic light emitting diode Display, which mainly comprises a plurality of groups of pixel (pixel) devices 20, wherein an Organic Light Emitting Diode (OLED)4 of each pixel device 20 adopts a common cathode grounding mode, a digital driving framework of writing luminous separation (Program Display Separated) is realized by controlling the potential of a power line 7, when image data is input, the potential of the power line 7 is connected to a zero potential (GND), so that the organic light emitting diode 4 cannot be lightened, and when the image data is output, the potential of the power line 7 is connected to a positive potential VH, so that the organic light emitting diode 4 is lightened.
To implement the above method, the pixel (pixel) device 20 of the present invention comprises: a switch unit 1, a driving unit 2, a storage unit 3 and an Organic Light Emitting Diode (OLED) 4; wherein,
the switch unit 1 can be a Thin Film Transistor (TFT) with P channel, two input ends 11, 12 of the switch unit 1 are respectively connected with a Scan Line (Scan Line)5 and a Data Line (Data Line) 6;
the driving unit 2, which may be a P-channel Thin Film Transistor (TFT), has an input terminal 21 connected to the power LINE (SUPPLY LINE)7, and another input terminal 22 connected to the output terminal 13 of the switching unit 1;
the storage unit 3 is composed of a capacitor, one end of the storage unit is connected to the power line 7, and the other end of the storage unit is connected to the connection position of the output end 13 of the switch unit 1 and the input end 22 of the drive unit 2;
an input terminal 41 of the Organic Light Emitting Diode (OLED)4 is connected to the output terminal 23 of the driving unit 2, and an output terminal 42 of the Organic Light Emitting Diode (OLED)4 is grounded;
when the device scans image data, the potential of the power line 7 is connected to the zero potential GND, so that the organic light emitting diode 4 cannot be lightened, the switch unit 1 is in a conducting state, the image data enters the switch unit 1 from the data line 6 at the moment, is scanned by the scanning line 5 and then is stored in the storage unit 3 (namely the storage unit is charged after the switch unit is conducted), if the image data is lightened, the negative voltage VL is stored in the storage unit 3, and if the image data is not lightened, the zero voltage GND is stored in the storage unit 3; the potential of the scan line during the scanning process is negative VL, and the potentials of the other scan lines are positive VH, and after all scanning operations are completed, the potential of the power line 7 is connected to the positive VH, so that the oled 4 of the pixel device 20 storing the negative VL voltage in the storage unit 3 is turned on.
Referring to fig. 3-1 and 3-2, a schematic diagram of a single pixel device of an active matrix organic light emitting diode display according to a third embodiment of the present invention and a timing diagram of a driving voltage waveform of fig. 3-1 are shown. As shown in the figure: the invention relates to a digital driving method and device of an active organic light emitting diode display, which mainly comprises a plurality of groups of pixel (pixel) devices 30 and 40, wherein an Organic Light Emitting Diode (OLED)4 of each pixel device 30 and 40 adopts a common cathode grounding mode, the digital driving framework of writing luminous separation (programmed display Separated) is realized by controlling the potential of a power line 7, when image data is input, the potential of the power line 7 is connected to a zero potential (GND), so that the organic light emitting diode 4 cannot be lightened, and when the image data is output, the potential of the power line 7 is connected to a positive potential VH, so that the organic light emitting diode 4 is lightened.
To implement the above method, the pixel (pixel) device 30 of the present invention comprises: a switch unit 1, a driving unit 2, a storage unit 3 and an Organic Light Emitting Diode (OLED) 4; wherein,
the switch unit 1 can be a Thin Film Transistor (TFT) with P channel, two input ends 11, 12 of the switch unit 1 are respectively connected with a Scan Line (Scan Line)5 and a Data Line (Data Line) 6;
the driving unit 2, which may be a P-channel Thin Film Transistor (TFT), has an input terminal 21 connected to the power LINE (SUPPLY LINE)7, and another input terminal 22 connected to the output terminal 13 of the switching unit 1;
the storage unit 3 is composed of a capacitor, one end of the storage unit is connected to the connection between the output end 13 of the switch unit 1 and the input end 22 of the driving unit 2, and the other end is connected to the scanning line 8 of the adjacent pixel device 40;
an input terminal 41 of the Organic Light Emitting Diode (OLED)4 is connected to the output terminal 23 of the driving unit 2, and an output terminal 42 of the Organic Light Emitting Diode (OLED)4 is grounded;
when the device scans image data, the potential of the power line 7 is connected to the zero potential GND, so that the organic light emitting diode 4 cannot be lightened, the switch unit 1 is in a conducting state, the image data enters the switch unit 1 from the data line 6 at the moment, is scanned by the scanning line 5 and then is stored in the storage unit 3 (namely, the storage unit is charged after the switch unit is conducted), if the image data is lightened, the zero voltage GND is stored in the storage unit 3, and if the image data is not lightened, the positive voltage VH is stored in the storage unit 3; the potential of the scan line during the scanning process is the zero potential GND, the potentials of the other scan lines are the positive potential VH, and after all the scanning operations are completed, the potential of the power line 7 is connected to the positive potential VH, so that the organic light emitting diode 4 of the pixel device 30 storing the zero voltage GND in the storage unit 3 is turned on.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. All the equivalent changes and modifications made according to the claims of the present invention are covered by the claims of the present invention.
Claims (10)
1. A digital driving device for an active matrix organic light emitting diode display, the display being formed by a plurality of pixel devices (10), each pixel device (10) comprising:
a switch unit (1) having two input terminals (11), (12) and an output terminal (13), the two input terminals (11), (12) being connected to the data line (6) and the scan line (5), respectively;
a driving unit (2) having two input terminals (21, 22) and an output terminal (23), wherein the two input terminals (21, 22) are respectively connected to the power line (7) and the output terminal (13) of the switch unit (1);
a storage unit (3) with one end grounded and the other end connected to the connection between the output end (13) of the switch unit (1) and the input end (22) of the drive unit (2);
an organic light emitting diode (4) having an input terminal (41) and an output terminal (42), the input terminal (41) being connected to the output terminal (23) of the driving unit (2), and the output terminal (42) being grounded;
when the pixel device (10) scans image data, the potential of the power line (7) is connected to zero potential, so that the organic light emitting diode (4) cannot be lightened, the switch unit (1) is in a conducting state, the image data enters the switch unit (1) from a data line and is stored in the storage unit (3) after being scanned by the scanning line (5), if the image data is lightened, zero voltage is stored in the storage unit (3), if the image data is not lightened, positive voltage is stored in the storage unit (3), and after all scanning operations are finished, the potential of the power line (7) is connected to the positive potential, so that the organic light emitting diode of the pixel device (10) which stores the zero voltage in the storage unit (3) is lightened (4).
2. The digital driving apparatus for an active matrix organic light emitting diode display according to claim 1, wherein the potential of the scan line (5) is zero and the potentials of the other scan lines (5) are positive during the scanning process.
3. The digital driving device for an active organic light emitting diode display according to claim 1, wherein the switching unit (1) and the driving unit (2) are Thin Film Transistors (TFT) with P channel.
4. The digital driving apparatus for an active matrix organic light emitting diode display according to claim 1, wherein the storage unit (3) is formed by a capacitor.
5. A digital driving method for an active matrix organic light emitting diode display, the display being formed by a plurality of pixel devices (20), wherein each pixel device (20) comprises:
a switch unit (1) having two input terminals (11), (12) and an output terminal (13), the two input terminals (11), (12) being connected to the data line (6) and the scan line (5), respectively;
a driving unit (2) having two input terminals (11), (12) and an output terminal (13), wherein the two input terminals (11), (12) are respectively connected to the power line (7) and the output terminal (13) of the switch unit (1);
a storage unit (3) having one end connected to the power line (7) and the other end connected to the connection between the output end (13) of the switch unit (1) and the input end (22) of the driving unit (2);
an organic light emitting diode (4) having an input terminal (41) and an output terminal (42), the input terminal (41) being connected to the output terminal (23) of the driving unit (2), and the output terminal (42) being grounded;
the method is characterized in that: when the pixel device (20) scans image data, the potential of the power line (7) is connected to zero potential, so that the organic light emitting diode (4) cannot be lightened, the switch unit (1) is in a conducting state, the image data enters the switch unit (1) through the data line (6) and is stored in the storage unit (3) after being scanned by the scanning line (5), if the image data is lightened, negative voltage is stored in the storage unit (3), if the image data is not lightened, zero voltage is stored in the storage unit (3), and after all scanning actions are finished, the potential of the power line (7) is connected to positive potential, so that the organic light emitting diode (4) of the pixel device (20) storing the negative voltage in the storage unit (3) is lightened.
6. A digital driving method for an active matrix OLED display according to claim 5, wherein the potential of the scan line (5) during the scanning is negative and the potential of the other scan lines (5) is positive.
7. A digital driving device for an active matrix organic light emitting diode display, the display being formed by a plurality of pixel devices (30), (40), each pixel device (30), (40) comprising:
a switch unit (1) having two input terminals (11), (12) and an output terminal (13), the two input terminals (11), (12) being connected to the data line (6) and the scan line (5), respectively;
a driving unit (2) having two input terminals (21, 22) and an output terminal (23), wherein the two input terminals (21, 22) are respectively connected to the power line (7) and the output terminal (13) of the switch unit (1);
a storage unit (3), one end of which is connected to the connection between the output end (13) of the switch unit (1) and the input end (22) of the drive unit (2), and the other end is connected to the scanning line (8) of the adjacent pixel device (40);
an organic light emitting diode (4) having an input terminal (41) and an output terminal (13), the input terminal (41) being connected to the output terminal (23) of the driving unit (2), and the output terminal (42) being grounded;
when the pixel devices (30) and (40) scan image data, the potential of the power line (7) is connected to zero potential, so that the organic light emitting diode (4) cannot be lightened, the switch unit (1) is in a conducting state, the image data enters the switch unit (1) from the data line (6) and is stored in the storage unit (3) after being scanned by the scanning line (5), if the image data is lightened, zero voltage is stored in the storage unit (3), if the image data is not lightened, positive voltage is stored in the storage unit (3), after all scanning actions are finished, the potential of the power line (7) is connected to the positive potential, so that the organic light emitting diode (4) of the pixel device (30) storing the zero voltage in the storage unit (3) is lightened.
8. The digital driving apparatus for an active matrix organic light emitting diode display according to claim 7, wherein the potential of the scan line (5) is zero and the potentials of the other scan lines (5) are positive during the scanning process.
9. A digital driving method for active organic light emitting diode display is composed of multiple groups of pixel units (30, 40), and features that when each pixel unit (30, 40) inputs image data, the potential of power line (7) is connected to zero potential to make organic light emitting diode (4) not be lighted, and when image data is output, the potential of power line (7) is connected to positive potential to make organic light emitting diode (4) be lighted.
10. The method of claim 7, wherein the Organic Light Emitting Diode (OLED) (4) of each pixel device (30), (40) is grounded via common cathode.
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| CNB031018971A CN1332370C (en) | 2003-01-29 | 2003-01-29 | Digital drive method and apparatus for active organic light-emitting diode display |
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| CNB031018971A CN1332370C (en) | 2003-01-29 | 2003-01-29 | Digital drive method and apparatus for active organic light-emitting diode display |
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| CN1332370C true CN1332370C (en) | 2007-08-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2430069A (en) * | 2005-09-12 | 2007-03-14 | Cambridge Display Tech Ltd | Active matrix display drive control systems |
| JP5146090B2 (en) * | 2008-05-08 | 2013-02-20 | ソニー株式会社 | EL display panel, electronic device, and driving method of EL display panel |
| CN101605416B (en) * | 2008-06-13 | 2013-02-27 | 登丰微电子股份有限公司 | LED driving circuit and controller thereof |
| CN103268755B (en) * | 2013-05-28 | 2015-01-14 | 中国科学院上海高等研究院 | Active organic light emitting array driving system and driving method |
| CN105489158B (en) * | 2014-09-19 | 2018-06-01 | 深圳Tcl新技术有限公司 | OLED pixel driving circuit and television set |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10161564A (en) * | 1996-11-28 | 1998-06-19 | Casio Comput Co Ltd | Display device |
| JP2775040B2 (en) * | 1991-10-29 | 1998-07-09 | 株式会社 半導体エネルギー研究所 | Electro-optical display device and driving method thereof |
| CN1366344A (en) * | 2001-01-18 | 2002-08-28 | 夏普公司 | Memory integrated display element |
| CN1462025A (en) * | 2002-05-28 | 2003-12-17 | 友达光电股份有限公司 | Designing method of display driving circuit |
| CN1464496A (en) * | 2002-06-14 | 2003-12-31 | 统宝光电股份有限公司 | Picture element circuit |
| CN1472722A (en) * | 2002-07-29 | 2004-02-04 | 友达光电股份有限公司 | Unit picture element driving circuit of organic electroluminescence display device |
-
2003
- 2003-01-29 CN CNB031018971A patent/CN1332370C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2775040B2 (en) * | 1991-10-29 | 1998-07-09 | 株式会社 半導体エネルギー研究所 | Electro-optical display device and driving method thereof |
| JPH10161564A (en) * | 1996-11-28 | 1998-06-19 | Casio Comput Co Ltd | Display device |
| CN1366344A (en) * | 2001-01-18 | 2002-08-28 | 夏普公司 | Memory integrated display element |
| CN1462025A (en) * | 2002-05-28 | 2003-12-17 | 友达光电股份有限公司 | Designing method of display driving circuit |
| CN1464496A (en) * | 2002-06-14 | 2003-12-31 | 统宝光电股份有限公司 | Picture element circuit |
| CN1472722A (en) * | 2002-07-29 | 2004-02-04 | 友达光电股份有限公司 | Unit picture element driving circuit of organic electroluminescence display device |
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