CN101853624A - Display device and signal transmission method of the same - Google Patents
Display device and signal transmission method of the same Download PDFInfo
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- CN101853624A CN101853624A CN200910134077A CN200910134077A CN101853624A CN 101853624 A CN101853624 A CN 101853624A CN 200910134077 A CN200910134077 A CN 200910134077A CN 200910134077 A CN200910134077 A CN 200910134077A CN 101853624 A CN101853624 A CN 101853624A
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Abstract
The invention provides a display device and a signal transmission method of the same. The display device comprises a timing controller, a display panel and at least one first part. The timing controller is used for generating data signals and clock signals, and is provided with at least one port corresponding to the first part. The first part is coupled between the port and the display panel, and each first part comprises a plurality of source drivers and a connecting interface. The source drivers include a first source driver directly connected with the timing controller and a plurality of second source drivers. The connecting interface is coupled between the port and the source drivers, and data signals and clock signals generated by the timing controller are transmitted to the first source driver via a pair of differential data signal lines and a pair of differential clock signal lines; and then, the data signals and the clock signals received by the first source driver are transmitted to the second source drivers via clock signal lines and data signal lines.
Description
Technical field
The present invention refers to a kind of display device and signal transmission method thereof with time schedule controller of less pin especially about a kind of image display and related signal transmission method.
Background technology
Along with the fast development of display technique, flat-panel screens replaces traditional cathode-ray tube display gradually, and is widely used in the electronic installations such as notebook computer, personal digital assistant, flat-surface television or mobile phone.Common flat-panel screens comprises the membrane transistor LCD, LTPS LCD and organic light emitting diode display etc.
LCD (LCD) comprises display panels time schedule controller, a plurality of gate pole driver, plurality of sources driver CD1-CDn, and the signal line (as time pulse signal line and document signal line) that is used for transmitting different signals.Display panels is provided with a plurality of data lines parallel to each other and a plurality of sweep traces parallel to each other, data line and sweep trace are interlaced with each other, viewing area in each junction is equipped with image element circuit, so display panels comprises a plurality of image element circuit arrays with arrayed.Time schedule controller is used for producing the document signal DATA1-DATAn that is relevant to show image, and drives required controlling signal and the time pulse signal CLK of display panels.Gate pole driver is used for producing the scanning signal of opening or closing the image element circuit array, and source electrode driver produces the driving signal of display panels according to document signal, controlling signal and time pulse signal CLK.
See also Fig. 1, Figure 1 shows that the Organization Chart of LCD drive circuits of the prior art.What liquid crystal indicator of the prior art adopted is point-to-point interface, and time pulse signal CLK and document signal DATA1-DATAm are sent to each source electrode driver CD1-CDn through corresponding data line in the point-to-point interface by time schedule controller TCON in point-to-point mode.Each source electrode driver CD1-CDn all comprises reception/demoder, is coupled to corresponding data line in the point-to-point interface.The embedded signal that each reception/demoder decodable code is transmitted by time schedule controller, and produce corresponding time pulse signal and document signal to corresponding source electrode driver.Each source electrode driver can be exported corresponding driving signal to the LCD panel according to separating code data.This point-to-point transmission mode, if the source electrode driver number is many more, then the pin number of time schedule controller is just many more, the pin spacing will reduce, and so can reduce the yield of combination process, improve the price of time schedule controller, thereby increase the production cost of liquid crystal indicator.
In addition, because above-mentioned point-to-point interface promptly comprises the signal line (as time pulse signal line and document signal line) that is used for transmitting different signals, also comprise other controlling signal lines and reference voltage signal line Vr (DC Reference Voltage) etc., and these circuits and time schedule controller all are to be arranged on the printed circuit board (PCB).Required because of signal transmission architecture and sequential control thereof, cause driving circuit of the prior art because of the cloth spare and the required area that need expend circuit board in a large number that winds the line, this can reduce the yield of combination process equally, and increases the production cost of liquid crystal indicator.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of display device and signal transmission method thereof, by using single-port to have only the linkage interface of pair of differential document signal line and pair of differential time pulse signal line, make time schedule controller have less pin count, keeping the cost of saving time schedule controller under the framework of high-speed transfer.
For reaching above-mentioned purpose, the invention provides a kind of display device, display device comprises time schedule controller, display panel and at least one first.Time schedule controller is used for producing document signal and clock pulse signal, and this time schedule controller has at least one port.Display panel is used for show image.At least one first is corresponding with this at least one port, and is coupled between this port and this display panel, and each this first comprises plurality of sources driver and linkage interface.The plurality of sources driver comprises first source electrode driver, directly connects this time schedule controller, is used for receiving the signal from this time schedule controller; And a plurality of second source electrode drivers.Linkage interface couples between this port and this plurality of sources driver.This linkage interface comprises pair of differential document signal line, pair of differential sequential signal line, a pair of time pulse signal line and many to the document signal line.Pair of differential document signal line is used for receiving this document signal that this time schedule controller produces, and this document signal is reached this first source electrode driver; Pair of differential sequential signal line is used for receiving this sequential signal that this time schedule controller produces, and this sequential signal is reached this first source electrode driver; A pair of time pulse signal line sends this a plurality of second source electrode drivers in order to this time pulse signal that this first source electrode driver is received; Many the document signal line is sent to this a plurality of second source electrode drivers in order to this document signal that this first source electrode driver is received.
As optional technical scheme, this first source electrode driver comprises first receiving device, second receiving trap and output unit.First receiving device is used for receiving this document signal that this transmits the differential document signal line; Second receiving trap is used for receiving this sequential signal that this transmits differential sequential signal line; Output unit is used for exporting this document signal and this sequential signal.
As optional technical scheme, this linkage interface is little low-voltage differential signal interface.
As optional technical scheme, those source electrode drivers are connected in series to the time pulse signal line by this, and those source electrode drivers manyly are connected in series to the document signal line by this.
As optional technical scheme, those source electrode drivers connect the time pulse signal line parallel by this, and those source electrode drivers manyly connect the document signal line parallel by this.
The present invention also provides a kind of signal transmission method of display device, and this display device comprises time schedule controller, display panel, at least one first and the linkage interface with at least one port.At least one first is corresponding with this at least one port, and is coupled between this port and this display panel, and each this first comprises the plurality of sources driver, and the plurality of sources driver comprises first source electrode driver and a plurality of second source electrode driver.Linkage interface couples between this port and this plurality of sources driver.This signal transmission method comprises: this time schedule controller produces sequential signal and the document signal that is relevant to this display device; The pair of differential document signal line that sees through this linkage interface is sent to this first source electrode driver with this document signal; The pair of differential time pulse signal line that sees through this linkage interface is sent to this first source electrode driver with this time pulse signal; The a pair of time pulse signal line that sees through this linkage interface is sent to this a plurality of second source electrode drivers with this time pulse signal; And see through the many of this linkage interface the document signal line is sent to this a plurality of second source electrode drivers with this document signal.
As optional technical scheme, this signal transmission method also comprises: the first receiving device that sees through first source electrode driver receives this document signal that this transmits the differential document signal line; Second receiving trap that sees through this first source electrode driver receives this time pulse signal that this transmits differential time pulse signal; And the output unit that sees through this first source electrode driver is exported this document signal and this time pulse signal.
As optional technical scheme, this linkage interface is little low-voltage differential signal interface.
As optional technical scheme, those source electrode drivers are connected in series to the time pulse signal line by this, and those source electrode drivers manyly are connected in series to the document signal line by this.
As optional technical scheme, those source electrode drivers connect the time pulse signal line parallel by this, and those source electrode drivers manyly connect the document signal line parallel by this.
Can be about the advantages and spirit of the present invention by following detailed Description Of The Invention and appended graphic being further understood.
Description of drawings
Figure 1 shows that the Organization Chart of LCD drive circuits of the prior art;
Figure 2 shows that synoptic diagram according to first embodiment of display device of the present invention;
Figure 3 shows that simplification Organization Chart according to the driving circuit of first embodiment of display device of the present invention;
Figure 4 shows that simplification Organization Chart according to the driving circuit of second embodiment of display device of the present invention;
Figure 5 shows that process flow diagram according to the signal transmission method of display device of the present invention.
Embodiment
See also Fig. 2 and Fig. 3, Figure 2 shows that synoptic diagram, Figure 3 shows that simplification Organization Chart according to the driving circuit of first embodiment of display device of the present invention according to first embodiment of display device of the present invention.The present invention is example with the liquid crystal indicator, and liquid crystal indicator 1 comprises time schedule controller 2, display panel 3 and at least one first 4.Comprise that with liquid crystal indicator 1 two firsts 4 are example in the present embodiment.Time schedule controller 2 is used for producing document signal and clock pulse signal, and time schedule controller 2 has at least one port 21, and having two ports 21 with time schedule controller 2 in the present embodiment is example.Wherein time schedule controller 2 is to be arranged on the printed circuit board (PCB) (not shown).Display panel 3 comprises a plurality of sweep traces and a plurality of data lines that are provided with matrix-style, is used for show image.At least one first 4 is corresponding with at least one port 21, and is coupled between port 21 and the display panel 2, is to be example with two ports 21 in the present embodiment, and then corresponding have two firsts 4.
Each first 4 comprises plurality of sources driver CD and linkage interface 5.The plurality of sources driver is coupled to display panel 2, is used for driving this a plurality of data lines.Liquid crystal indicator 1 also includes a plurality of gate pole drivers in addition, is coupled to display panel 2, is used for driving this a plurality of sweep traces.Plurality of sources driver CD comprises first source electrode driver and a plurality of second source electrode driver, comprise that with plurality of sources driver CD one first source electrode driver CD1 and three second source drive CD2-CD4 are example in the present embodiment, wherein the first source electrode driver CD1 directly connects time schedule controller 2, promptly be connected to the port 21 of time schedule controller 2, be used for receiving signal from time schedule controller 2.Linkage interface 5 couples between port 21 and the plurality of sources driver CD.Linkage interface 5 comprises pair of differential document signal line 7, pair of differential sequential signal line 8, a pair of time pulse signal line 9 and many to document signal line 10.This is used for receiving the document signal that time schedule controller 2 is produced to differential document signal line 7, and document signal is reached the first source electrode driver CD1.Should be used for receiving the sequential signal that time schedule controller 2 is produced to differential sequential signal line 8, and the sequential signal was reached the first source electrode driver CD1.This sends a plurality of second source electrode driver CD2-CD4 to time pulse signal line 9 in order to the time pulse signal that the first source electrode driver CD1 is received.These are many to send a plurality of second source electrode driver CD2-CD4 to document signal line 10 in order to the document signal that the first source electrode driver CD1 is received.
Wherein, linkage interface 5 for example is electric crystal-resistor capacitor transistor logic (Transistor-transistorLogic, TTL) interface, low-swing differential signals (Reduced swing differential signal, RSDS) interface, low voltage differential signal (Low voltage differential signal, LVDS) interface, or little low-voltage differential signal (mini low voltage differential signal, mimi-LVDS) interface, be example with linkage interface 5 for little low-voltage differential signal interface in the present embodiment, little low-voltage differential signal layout setting is on circuit board 11, that is document signal and time pulse signal transmission channel are to apply on circuit board 11 with the array routing technology.Circuit board 11 for example is printed circuit board (PCB) or flexible circuit board.
Please continue referring to Fig. 3, in the present embodiment, those source electrode drivers CD1-CD4 is connected in parallel to time pulse signal line 9 by this, and simultaneously those source electrode drivers CD1-CD4 also manyly is connected in parallel to document signal line 10 by this.The signal line that document signal that time schedule controller 2 produces and time pulse signal see through little low-voltage differential signal interface 5 or other compatible interface transfers to the first source electrode driver CD1.Wherein, the first source electrode driver CD1 comprises first receiving device 12, second receiving trap 13 and output unit 14.First receiving device 12 is used for receiving the document signal that this transmits differential document signal line 7.Second receiving trap 13 is used for receiving the sequential signal that this transmits differential sequential signal line 8.14 of output units are used for exporting document signal and sequential signal to a plurality of second source electrode driver CD2-CD4.Be that plurality of sources driver CD1-CD4 is formed by connecting with parallel form, document signal that this kind circuit receives the first source electrode driver CD1 and sequential signal reach a plurality of second source electrode driver CD2-CD4 with the transfer mode of parallel connection, promptly the first source electrode driver CD1 receives document signal and the time pulse signal from time schedule controller 2, utilize and many document signal line 10 and a pair of time pulse signal line 9 are transmitted little low-voltage differential signal, a plurality of second source electrode driver CD2-CD4 are received from little low-voltage differential signal that the first source electrode driver CD1 transmits.In such cases, first source electrode driver can receive and transmit signal simultaneously, and second source electrode driver then is a receiving mode, can only carry out the reception of signal.
See also Fig. 4, Figure 4 shows that simplification Organization Chart according to the driving circuit of second embodiment of display device of the present invention.The signal line that document signal that time schedule controller 2 produces and time pulse signal see through little low-voltage differential signal interface or other compatible interface transfers to the first source electrode driver CD1, then transfers to a plurality of second source electrode driver CD2-CD4 more in regular turn.Present embodiment in, plurality of sources driver CD1-CD4 is connected in series to time pulse signal line 9 by this, and those source electrode drivers CD1-CD4 manyly is connected in series to document signal line 10 by this.Be that plurality of sources driver CD1-CD4 is formed by connecting with the serial connection form, this kind circuit reaches next second source electrode driver with document signal and sequential signal in the mode of transmitting step by step, promptly the first source electrode driver CD1 receives document signal and the time pulse signal from time schedule controller 2, utilize again and many document signal line 10 and a pair of time pulse signal line 9 are transmitted little low-voltage differential signal, the second source electrode driver CD2 that is close to the first source electrode driver CD1 is received from little low-voltage differential signal that the first source electrode driver CD1 transmits, be close to the little low-voltage differential signal of the second source electrode driver CD3 reception of the second source electrode driver CD2 from the second source electrode driver CD2, the rest may be inferred.In such cases, first source electrode driver can receive and transmit signal simultaneously, and second source electrode driver also receives the signal of last source electrode driver simultaneously the signal that receives is transferred to next source electrode driver.
See also Fig. 5, Figure 5 shows that process flow diagram according to the signal transmission method of display device of the present invention.The present invention also provides a kind of signal transmission method of display device, is example with the liquid crystal indicator, and liquid crystal indicator 1 comprises time schedule controller 2, display panel, at least one first 4 and the linkage interface 5 with at least one port 21.At least one first 4 is corresponding with at least one port 21, and is coupled between port 21 and the display panel 3, and each first 4 comprises plurality of sources driver CD, and plurality of sources driver CD comprises first source electrode driver and a plurality of second source electrode driver.Comprise that with the plurality of sources driver one first source electrode driver CD1 and three second source drive CD2-CD4 are example in the present embodiment.Linkage interface 5 couples CD1-CD4 between port 21 and the plurality of sources driver.The signal transmission method of liquid crystal indicator 1 comprises following steps:
Step S10, time schedule controller 2 produces sequential signal and the document signal that is relevant to display device 1;
Step S11, the pair of differential document signal line 7 that sees through linkage interface 5 is sent to the first source electrode driver CD1 with the document signal that time schedule controller 1 produces;
Step S12, the pair of differential time pulse signal line 8 that sees through linkage interface 5 is sent to the first source electrode driver CD1 with the time pulse signal that time schedule controller 1 produces;
Step S13 sees through the time pulse signal that a pair of time pulse signal line 9 of linkage interface 5 receives the first source electrode driver CD1 and is sent to a plurality of second source electrode driver CD2-CD4; And
Step S14, the many document signals that document signal line 10 is received the first source electrode driver CD1 that see through linkage interface 5 are sent to a plurality of second source electrode driver CD2-CD4.
Wherein, linkage interface 5 for example is little low-voltage differential signal interface.
Among the present invention, the signal transmission method of liquid crystal indicator 1 is further comprising the steps of:
In the process of step S11, the first receiving device 12 that sees through the first source electrode driver CD1 receives the document signal that this transmits differential document signal line 7; In step S12 process, second receiving trap 13 that sees through the first source electrode driver CD1 receives the time pulse signal that this transmits differential time pulse signal line 8; And in step S13 and step S14 process, the output unit 14 that sees through the first source electrode driver CD1 is exported document signal and time pulse signal.
Wherein among the step S14, if plurality of sources driver CD1-CD4 is formed by connecting with parallel form, document signal that this kind circuit receives the first source electrode driver CD1 and sequential signal reach a plurality of second source electrode driver CD2-CD4 with the transfer mode of parallel connection, promptly the first source electrode driver CD1 receives document signal and the time pulse signal from time schedule controller 2, utilize and many document signal line 10 and a pair of time pulse signal line 9 are transmitted little low-voltage differential signal, a plurality of second source electrode driver CD2-CD4 are received from little low-voltage differential signal that the first source electrode driver CD1 transmits.
Wherein among the step S14, if plurality of sources driver CD1-CD4 is connected in series to time pulse signal line 9 by this, and those source electrode drivers CD1-CD4 manyly is connected in series to document signal line 10 by this.Be that plurality of sources driver CD1-CD4 is formed by connecting with the serial connection form, this kind circuit reaches next second source electrode driver with document signal and sequential signal with transfer mode step by step, promptly the first source electrode driver CD1 receives document signal and the time pulse signal from time schedule controller 2, utilize again and many document signal line 10 and a pair of time pulse signal line 9 are transmitted little low-voltage differential signal, the second source electrode driver CD2 that is close to the first source electrode driver CD1 is received from little low-voltage differential signal that the first source electrode driver CD1 transmits, be close to the little low-voltage differential signal of the second source electrode driver CD3 reception of the second source electrode driver CD2 from the second source electrode driver CD2, the rest may be inferred.
In sum, by display device of the present invention and signal transmission method thereof, the linkage interface that has only pair of differential document signal line and pair of differential time pulse signal line by the single-port that uses time schedule controller, and make the sequential signal reach other source electrode driver from first source electrode driver by the mode of serial or parallel connection, make time schedule controller have less pin count, keeping the cost of saving time schedule controller under the framework of high-speed transfer.
By the detailed description of above embodiment, be to wish to know more to describe feature of the present invention and spirit, and be not to come claim scope of the present invention is limited with above-mentioned disclosed embodiment.On the contrary, its objective is that hope can contain in being arranged in of various changes and the tool equality claim scope of the present invention.Therefore, claim scope of the present invention should be done the broadest explanation according to above-mentioned explanation, contains the arrangement of all possible change and tool equality to cause it.
Claims (10)
1. a display device is characterized in that this display device comprises
Time schedule controller is used for producing document signal and clock pulse signal, and this time schedule controller has at least one port;
Display panel is used for show image; And
At least one first, corresponding with this at least one port, and be coupled between this port and this display panel, wherein each this first comprises
The plurality of sources driver comprises:
First source electrode driver directly connects this time schedule controller, is used for receiving this document signal and this time pulse signal from this time schedule controller; And
A plurality of second source electrode drivers; And
Linkage interface couples between this port and this plurality of sources driver, and this linkage interface comprises
Pair of differential document signal line is used for receiving this document signal that this time schedule controller produces, and this document signal is reached this first source electrode driver;
Pair of differential sequential signal line is used for receiving this sequential signal that this time schedule controller produces, and this sequential signal is reached this first source electrode driver;
A pair of time pulse signal line sends this a plurality of second source electrode drivers in order to this time pulse signal that this first source electrode driver is received; And
Many to the document signal line, send this a plurality of second source electrode drivers in order to this document signal that this first source electrode driver is received.
2. display device as claimed in claim 1 is characterized in that this first source electrode driver comprises
First receiving device is used for receiving this document signal that this transmits the differential document signal line;
Second receiving trap is used for receiving this sequential signal that this transmits differential sequential signal line; And output unit, be used for exporting this document signal and this sequential signal.
3. display device as claimed in claim 1 is characterized in that this linkage interface is little low-voltage differential signal interface.
4. display device as claimed in claim 1 is characterized in that those source electrode drivers are connected in series to the time pulse signal line by this, and those source electrode drivers manyly are connected in series to the document signal line by this.
5. display device as claimed in claim 1 is characterized in that those source electrode drivers connect the time pulse signal line parallel by this, and those source electrode drivers manyly connect the document signal line parallel by this.
6. the signal transmission method of a display device, this display device comprises
Time schedule controller has at least one port;
Display panel is used for display image;
At least one first, corresponding with this at least one port, and be coupled between this port and this display panel, each this first comprises the plurality of sources driver, this plurality of sources driver comprises first source electrode driver and a plurality of second source electrode driver; And
Linkage interface couples between this port and this plurality of sources driver; It is characterized in that this signal transmission method comprises:
This time schedule controller produces sequential signal and the document signal that is relevant to this display device;
The pair of differential document signal line that sees through this linkage interface is sent to this first source electrode driver with this document signal;
The pair of differential time pulse signal line that sees through this linkage interface is sent to this first source electrode driver with this time pulse signal;
The a pair of time pulse signal line that sees through this linkage interface is sent to this a plurality of second source electrode drivers with this time pulse signal; And
See through the many of this linkage interface the document signal line is sent to this a plurality of second source electrode drivers with this document signal.
7. signal transmission method as claimed in claim 6 is characterized in that this signal transmission method also comprises:
The first receiving device that sees through this first source electrode driver receives this document signal that this transmits the differential document signal line;
Second receiving trap that sees through this first source electrode driver receives this time pulse signal that this transmits differential time pulse signal line; And
The output unit that sees through this first source electrode driver is exported this document signal and this time pulse signal.
8. signal transmission method as claimed in claim 6 is characterized in that this linkage interface is little low-voltage differential signal interface.
9. signal transmission method as claimed in claim 6 is characterized in that those source electrode drivers are connected in series to the time pulse signal line by this, and those source electrode drivers manyly are connected in series to the document signal line by this.
10. signal transmission method as claimed in claim 6 is characterized in that those source electrode drivers connect the time pulse signal line parallel by this, and those source electrode drivers manyly connect the document signal line parallel by this.
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CN200910134077A CN101853624A (en) | 2009-03-31 | 2009-03-31 | Display device and signal transmission method of the same |
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CN200910134077A CN101853624A (en) | 2009-03-31 | 2009-03-31 | Display device and signal transmission method of the same |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102542974A (en) * | 2010-12-28 | 2012-07-04 | 硅工厂股份有限公司 | Method and apparatus for transmitting data between timing controller and source driver, having bit error rate test function |
CN105741728A (en) * | 2014-12-24 | 2016-07-06 | 乐金显示有限公司 | Controller source driver ic, display device, and signal transmission method thereof |
CN112614464A (en) * | 2019-10-04 | 2021-04-06 | 晶门科技(中国)有限公司 | Display panel with distributed driver network |
CN114758610A (en) * | 2020-12-28 | 2022-07-15 | 矽创电子股份有限公司 | Driving structure of display panel |
-
2009
- 2009-03-31 CN CN200910134077A patent/CN101853624A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102542974A (en) * | 2010-12-28 | 2012-07-04 | 硅工厂股份有限公司 | Method and apparatus for transmitting data between timing controller and source driver, having bit error rate test function |
US8775879B2 (en) | 2010-12-28 | 2014-07-08 | Silicon Works Co., Ltd. | Method and apparatus for transmitting data between timing controller and source driver, having bit error rate test function |
CN102542974B (en) * | 2010-12-28 | 2015-01-21 | 硅工厂股份有限公司 | Method and apparatus for transmitting data between timing controller and source driver, having bit error rate test function |
CN105741728A (en) * | 2014-12-24 | 2016-07-06 | 乐金显示有限公司 | Controller source driver ic, display device, and signal transmission method thereof |
US10297185B2 (en) | 2014-12-24 | 2019-05-21 | Lg Display Co., Ltd. | Controller, source driver IC, display device, and signal transmission method thereof |
CN112614464A (en) * | 2019-10-04 | 2021-04-06 | 晶门科技(中国)有限公司 | Display panel with distributed driver network |
CN114758610A (en) * | 2020-12-28 | 2022-07-15 | 矽创电子股份有限公司 | Driving structure of display panel |
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Application publication date: 20101006 |