CN105989809A - Liquid crystal display, source driver and drive signal polarity control method thereof - Google Patents
Liquid crystal display, source driver and drive signal polarity control method thereof Download PDFInfo
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- CN105989809A CN105989809A CN201510051591.XA CN201510051591A CN105989809A CN 105989809 A CN105989809 A CN 105989809A CN 201510051591 A CN201510051591 A CN 201510051591A CN 105989809 A CN105989809 A CN 105989809A
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Abstract
A liquid crystal display, a source driver and a drive signal polarity control method thereof are disclosed. The source driver comprises a signal receiving interface, a decoder and a controller. The signal receiving interface receives an image data series flow or a data output-input indication signal. The decoder parses out polarity control information from the image data series flow or the data output-input indication signal. The controller receives the polarity control information and decides the drive polarity of multiple drive signals produced by the source driver based on the polarity control information.
Description
Technical field
The present invention relates to a kind of liquid crystal display, source electrode driver and the controlling party of its driving signal polarity
Method, and particularly to a kind of control being not required on source electrode driver increase the driving signal polarity of additional pin
Method processed.
Background technology
In technical field now, horizontal double-point inversion (horizontal two dots, H2DOT)
Order of polarity can be every four channel cycle once, refer to Figure 1A, Figure 1B, Figure 1A and Figure 1B
Illustrate the schematic diagram of the Polarity Control mode of the source drive signal of known technology.In figure ia, mutually
Source electrode driver 110 and 120 receiving polarity respectively of concatenation controls information POLA and POLB is controlled
Make the polarity of source drive signal produced by it, wherein, Polarity Control information POLA and POLB
Can be the digital signal with N position, and it is multiple to produce to use control source electrode driver 110 and 120
The possibility of order of polarity of source drive signal.According to Figure 1B, in source electrode driver 110 and 120 institute
There is provided drive passage be not for the multiple of 4 under conditions of, for making the friendship of source electrode driver 110 and 120
The polarity of the source drive signal in boundary region ITZ maintains+,-,-,+change order, source drive
Change in polarity produced by device 120 needs to differ with source electrode driver 110, as double in the level of unlatching
During point reversion, the polarity discontinuous problem of generation.
Additionally, in recent known art, be commonly in red, green, blue, white (RGBW) face
Use the inversion technique of a kind of every eight channel cycle H4Inversion once to solve pure color pole on plate
The phenomenon of the identical image flicker (Flicker) caused of property, as shown in Figure 1 C, Fig. 1 C illustrates another kind
The schematic diagram of the Polarity Control mode of the source drive signal of known technology.Therefore, total number of channels is being driven
When not being the multiple for 8, the discontinuous problem of polarity as above also can occur.
Based on above-mentioned explanation, in the display of known technology, in order to horizontal double-point inversion machine can be carried out
System and above-mentioned H4Inversion inversion mechanism, be by joining on source electrode driver 110 and 120
Put extra pin and receive Polarity Control information POLA and POLB differed respectively.Such
The pin of the source driver chip that the practice can make increases, and makes the layout area of source driver chip increase
And make circuit cost increase.Further, for providing polarity control signal to extra the drawing of source driver chip
On foot, it is also desirable to the transfer wire that layout is extra, cause the increase of production cost equally.
Summary of the invention
The present invention provides a kind of liquid crystal display, source electrode driver and the controlling party of its driving signal polarity
Method, it may be unnecessary to many pins are set to be driven the Polarity Control action of signal at source electrode driver.
The source electrode driver of the present invention is applicable to a liquid crystal display, and source electrode driver includes that signal connects
Mouth, decoder and controller.Signal receiving interface receives view data crossfire or data output input refers to
Show signal.Decoder couples signal receiving interface, and is exported input instruction by view data crossfire or data
Signal parses Polarity Control information.Controller couples decoder, receives and according to Polarity Control information
To determine the driving polarity of multiple driving signals of source electrode driver generation.
The liquid crystal display of the present invention includes display floater, clock controller, gate drivers and as the most front
Described source electrode driver.Source electrode driver couples clock controller and display floater, source electrode driver
Mutually concatenation, and produce driving signal to drive display floater according to view data crossfire.Gate drivers
Couple clock controller and display floater, and produce gate drive signal to drive display floater.
The control method of the driving signal polarity of the source electrode driver of the present invention includes: receive view data string
Stream or data output input indicative signal；Exported in input indicative signal by view data crossfire or data and solve
Separate out Polarity Control information；And, receive and according to polarity inversion information to determine that source electrode driver produces
The driving polarity of multiple driving signals.
Based on above-mentioned, the present invention is by exporting Polarity Control information carry at view data crossfire or data
In input indicative signal, and exported the biography of input indicative signal by existing view data crossfire or data
Polarity Control information is transferred in source electrode driver by defeated action.Consequently, it is possible to source electrode driver can not
Need to utilize unnecessary pin to carry out receiving polarity and control information, it is also possible to its driving signal of effective carrying out
Polarity Control action, effectively reduces the cost needed for circuit.
For the features described above of the present invention and advantage can be become apparent, special embodiment below, and coordinate
Accompanying drawing is described in detail below.
Accompanying drawing explanation
Figure 1A, Figure 1B and Fig. 1 C illustrates the Polarity Control side of the source drive signal of multiple known technology
The schematic diagram of formula.
Fig. 2 illustrates the schematic diagram of the source electrode driver of the embodiment of the present invention.
Fig. 3 illustrates the schematic diagram of the source electrode driver of another embodiment of the present invention.
Fig. 4 illustrates the waveform diagram of the data output input indicative signal DIO of the embodiment of the present invention.
Fig. 5 illustrates the schematic diagram of the source electrode driver of yet another embodiment of the invention.
Fig. 6 A and Fig. 6 B illustrates showing of the carry mode of the Polarity Control information of the embodiment of the present invention respectively
It is intended to.
Fig. 7 illustrates the schematic diagram of the source electrode driver of a present invention more embodiment.
The schematic diagram of the carry mode of the Polarity Control information of the embodiment of the present invention that Fig. 8 illustrates.
Fig. 9 illustrates the schematic diagram of the liquid crystal display 900 of one embodiment of the invention.
Figure 10 illustrates the control method of the driving signal polarity of the source electrode driver of one embodiment of the invention.
[symbol description]
110,120,200,300,500,700,931～93N: source electrode driver
210,310,510,710: signal receiving interface
220,520,720: decoder
320: enumerator
230,330,530,730: controller
301,701: prime source electrode driver
540: arithmetical unit
550: encoder
702,920: clock controller
900: liquid crystal display
910: display floater
941～94M: gate drivers
DS: view data crossfire
DIO: data output input indicative signal
SDRV: source drive signal
POL, POLA, POLB, POLA1, POLA2: Polarity Control information
ITZ: juncture area
The output input marker pulse of PW: data
TS: time point
DIO1: secondary data output input indicative signal
CN: port number information
POL1: secondary Polarity Control information
IDATA1, IDATA2: view data
RST: pulse
S1010～S1030: drive the rate-determining steps of signal polarity
Detailed description of the invention
Refer to the schematic diagram that Fig. 2, Fig. 2 illustrate the source electrode driver of the embodiment of the present invention.Source drive
Device 200 includes signal receiving interface 210, decoder 220 and controller 230.Signal receiving interface
210 may be used to receive view data crossfire DS or data output input indicative signal DIO.Wherein, image
Data stream DS can be by clock controller in liquid crystal display (Timing controller, TCON) institute
Sending, and received by signal receiving interface 210, data output input indicative signal DIO then can be by
The source electrode driver of clock controller or prime sends, and is received by signal receiving interface 210.
View data crossfire DS includes liquid crystal display view data to display, and data output inputs
Indication signal DIO is then used to refer to source electrode driver 200 to be received or to transmit the time letter of data
Breath.
Decoder 220 couples signal receiving interface 210.Decoder 220 is by view data crossfire DS or number
Polarity Control information POL is parsed according in output input indicative signal DIO.Controller 230 then couples solution
Code device 220, and Polarity Control information POL that Rcv decoder 220 is obtained.Controller 230 also depends on
Multiple source drive signals produced by source electrode driver 200 are determined according to Polarity Control information POL
The driving polarity of SDRV, and use the driving order of polarity setting source drive signal SDRV, and make
The driving signal polarity order of source electrode driver 200 can meet horizontal double-point inversion and H4Inversion is anti-
The demands such as favourable turn.
In embodiments of the present invention, Polarity Control information POL by carry at view data crossfire DS or number
According in output input indicative signal DIO, connect consequently, it is possible to source electrode driver 200 may utilize signal
Mouth 210 is by the view data crossfire DS originally existed for or data output input indicative signal DIO
Middle acquisition Polarity Control information POL, say, that source electrode driver 200 need not by arranging extra
Pin carry out receiving polarity and control information POL, effectively reduce the cost of circuit.
Hereinafter refer to the schematic diagram that Fig. 3, Fig. 3 illustrate the source electrode driver of another embodiment of the present invention.
In figure 3, source electrode driver 300 is connected to prime source electrode driver 301.Source electrode driver 300 wraps
Include signal receiving interface 310, enumerator 320 and controller 330.Source electrode driver 300 is by signal
Receiving interface 310 is received data output input indicative signal DIO by prime source electrode driver 301, and will
Data output input indicative signal DIO is sent to enumerator 320.
In the specification of Low Voltage Differential Signal interface specification (mini-LVDS), enumerator 320 can pass through
The startup time of enumeration data output input indicative signal DIO judges prime source electrode driver 301
Number of channels.It is to say, the startup time by enumeration data output input indicative signal DIO is permissible
Judge the polarity shape driving signal of prime source electrode driver 301 and source electrode driver 300 intersection
State.Further, known prime source electrode driver 301 and source electrode driver 300 intersection are passed through
Drive the polarization state of signal, according to count results produced by enumerator 320, can obtain further
Polarity Control information POL.
In the acquisition details starting the time about data output input indicative signal DIO, refer to figure
The waveform diagram of 4, Fig. 4 data output input indicative signal DIO illustrating the embodiment of the present invention.Number
According to output input indicative signal DIO, there is a data output input marker pulse PW, and data output is defeated
The startup time entering indication signal DIO can be the time that data output input marker pulse PW occurs
Point, the time point TS of namely data output input indicative signal DIO transition to high logic level.Counting
Device 320 can start counting action when source electrode driver 300 is reset, and completes meter at time point TS
Number action, by count results produced by counting action, it is possible to learn Polarity Control information POL.
Subsidiary one carries, the horizontal-drive signal that enumerator 320 can be received according to source electrode driver 300
(HSYNC) reset and restart counting action.
Please referring again to Fig. 3, Polarity Control information POL obtained is sent to control by enumerator 320
Device 330.So, controller 330 can set produced source electrode according to Polarity Control information POL and drives
The order of the driving polarity of dynamic signal SDRV.It addition, controller 330 can be according to Polarity Control information
The port number driving signal of POL and source electrode driver 300 produces secondary data output input instruction
Signal DIO1, and secondary data is exported input indicative signal DIO1 send to secondary source electrode driver.
Secondary data output input indicative signal DIO1 can be used to notify that the source electrode driver of secondary is about source
The change in polarity shape of the source drive signal of the source electrode driver intersection of driver 300 and secondary
State, makes the source electrode driver of secondary can set the change in polarity of source drive signal produced by it according to this suitable
Sequence.
Hereinafter refer to the schematic diagram that Fig. 5, Fig. 5 illustrate the source electrode driver of yet another embodiment of the invention.
In Figure 5, source electrode driver 500 include signal receiving interface 510, decoder 520, controller 530,
Arithmetical unit 540 and encoder 550.Signal receiving interface 510 receives data output input indicative signal
DIO, and decoder 520 is for parsing carry polarity in data output input indicative signal DIO
Control information POL.Controller 530 then can set source drive signal according to Polarity Control information POL
The order of polarity of SDRV.
It is noted that in the embodiment of the present invention, source electrode driver 500 also include arithmetical unit 540 with
And encoder 550.Arithmetical unit 540, receiving polarity controlled the logical of information POL and source electrode driver 500
Number of channels information CN, and carry out computing for Polarity Control information POL and port number information CN and produce
Raw secondary Polarity Control information POL1.Encoder 550 is coupled to arithmetical unit 540, and in order to receive secondary
Polarity Control information POL1, and carry out coding for secondary Polarity Control information POL1 and make secondary polarity control
Information POL1 carry processed is on secondary data output input indicative signal DIO1.Encoder 550 also will be secondary
DBMS output input indicative signal DIO1 is sent to secondary source driver.
Arithmetical unit 540 in the embodiment of the present invention can be adder.
Additionally, refer to Fig. 6 A and Fig. 6 B, Fig. 6 A and Fig. 6 B to illustrate the embodiment of the present invention respectively
The schematic diagram of carry mode of Polarity Control information.In fig. 6, Polarity Control information POL is permissible
Before carry data output input marker pulse PW on data output input indicative signal DIO and adjacent
It is bordering on data output input marker pulse PW.Polarity Control information POL can utilize serial manner
Represent its information content, and the performance of any one serial data well-known to those skilled in the art can be applied
Mode is implemented, and does not has certain restriction.
In fig. 6b, Polarity Control information POL can export input indicative signal DIO with carry in data
On data output input marker pulse PW after, and be adjacent to data output input marker pulse PW.
Same, Polarity Control information POL can utilize serial manner to represent its information content, and can answer
Implement by the manifestation mode of any one serial data well-known to those skilled in the art, do not have certain
Limit.
Hereinafter refer to the schematic diagram that Fig. 7, Fig. 7 illustrate the source electrode driver of a present invention more embodiment.
Source electrode driver 700 is coupled to clock controller 702 and prime source electrode driver 701.Source drive
Device 700 includes signal receiving interface 710, decoder 720 and controller 730.Source electrode driver 700
View data crossfire DS is received by signal receiving interface 710, and by being coupled to signal receiving interface
The decoder 720 cause view data crossfire DS of 710 parses Polarity Control information POL.Decoder
Polarity Control information POL obtained is sent to controller 730 by 720.Controller 730 is according to pole
Property control information POL set the driving order of polarity of source drive signal SDRV produced by it.
In the present embodiment, corresponding Polarity Control information (such as Polarity Control information POL) at different levels can
It is set in advance by clock controller 702, and difference carry is in view data crossfire DS.Then,
Each Polarity Control information is sent to the source electrode driver of correspondence and (transmits polarity control by clock controller 702 again
Information POL processed is to corresponding source electrode driver 700).
About the carry mode of Polarity Control information POL, refer to the embodiment of the present invention that Fig. 8 illustrates
The schematic diagram of the carry mode of Polarity Control information.In fig. 8, Polarity Control information POLA1 and
POLA2 can distinguish carry standby time at non-transmitted image data ID ATA1 and IDATA2 in interval.
For example, in fig. 8, Polarity Control information POLA1 of the source electrode driver of the first order it is sent to
By carry before the time interval transmitting view data IDATA1 of source electrode driver of the first order, and pass
Polarity Control information POLA2 of the source electrode driver delivering to the second level is being transmitted first and second grade by carry
View data IDATA1 of source electrode driver, IDATA2 time interval between.
Subsidiary one carries, and pulse RST can be the reference starting point of view data crossfire DS transmission data.
Hereinafter refer to the schematic diagram that Fig. 9, Fig. 9 illustrate the liquid crystal display 900 of one embodiment of the invention.
Liquid crystal display 900 includes display floater 910, clock controller 920, source electrode driver 931～93N
And gate drivers 941～94M.Source electrode driver 931～93N is coupled to display floater 910 with in time
Source electrode driver in clock controller 920, and available aforesaid plurality of embodiment is implemented, and is used for producing
Raw source drive signal is to drive display floater 910.Gate drivers 941～94M is coupled to display floater
910 and clock controller 920, in order to produce gate drive signal to drive display floater 910.Wherein,
Gate drivers 941～94M can apply gate drivers well-known to those skilled in the art to implement, and does not has
There is certain restriction.
It should be noted that the source electrode driver 931～93N of the present embodiment need not set up extra pin
Carry out receiving polarity and control information, but utilize existing view data crossfire or data output input instruction letter
Number carry out receiving polarity and control information, effectively reduce the area needed for circuit, and then reduce the cost of circuit.
Hereinafter refer to the driving signal that Figure 10, Figure 10 illustrate the source electrode driver of one embodiment of the invention
The control method of polarity.The control method of the driving signal polarity of the source electrode driver of the present embodiment is applicable to
On liquid crystal display, wherein, in step S1010, receive view data crossfire or data output input
Indication signal, and, in step S1020, view data crossfire or data export input instruction letter
Number parse Polarity Control information.Then, in step S1030, then receive and according to Polarity Control
Information is to determine the driving polarity of multiple source drive signals of source electrode driver generation.
About the implementation detail in above-mentioned steps, existing detailed in aforesaid plurality of embodiment and embodiment
Explanation, at this pardon seldom repeat.
In sum, the present invention utilizes the existing view data crossfire of source electrode driver or data output input
Indication signal is carried out receiving polarity and is controlled information, it is not necessary to arrange extra pin to carry out Polarity Control information
Transfer operation, effectively reduce the circuit cost of source electrode driver, the price competitiveness of improving product.
Claims (15)
1. a source electrode driver, it is adaptable to liquid crystal display, including:
Signal receiving interface, receives view data crossfire or data output input indicative signal；
Decoder, couples this signal receiving interface, this view data crossfire or this data export input and refer to
Show and signal parses Polarity Control information；And
Controller, couples this decoder, receives and according to this Polarity Control information to determine this source drive
The driving polarity of multiple source drive signals that device produces.
2. source electrode driver as claimed in claim 1, wherein this signal receiving interface is by clock controller
Or prime source electrode driver receives these data output input indicative signal.
3. source electrode driver as claimed in claim 2, wherein this decoder is according to calculating the output of these data
The startup time point of the data output input marker pulse of input indicative signal is to parse this Polarity Control letter
Breath.
4. source electrode driver as claimed in claim 3, also includes:
Enumerator, couples this signal receiving interface and this controller, and this enumerator is according to clock signal pair
This startup time point of these data output input marker pulse carries out counting to obtain this Polarity Control information.
5. source electrode driver as claimed in claim 2, wherein this decoder is for the output input of these data
In indication signal, the signal of proximity data output input marker pulse is decoded obtaining this Polarity Control letter
Breath.
6. source electrode driver as claimed in claim 5, also includes:
Arithmetical unit, receive this Polarity Control information and port number information, and for this Polarity Control information
And this port number information carries out computing to produce the secondary Polarity Control information of secondary source driver；With
And
Encoder, couples this arithmetical unit to receive this secondary Polarity Control information, for this secondary polarity control
Information processed carries out coding makes this secondary Polarity Control information carry export input indicative signal at secondary data
On, and this secondary data output input indicative signal is sent to this secondary source driver.
7. source electrode driver as claimed in claim 1, wherein this signal receiving interface is by clock controller
Receive this view data crossfire, and be decoded obtaining this Polarity Control letter for this view data crossfire
Breath.
8. source electrode driver as claimed in claim 7, also includes:
Decoder, is coupled between this controller and this signal receiving interface, and for this view data string
Stream is decoded obtaining this Polarity Control information.
9. a liquid crystal display, including:
Display floater；
Clock controller；And
Multiple source electrode drivers as claimed in claim 1, couple this clock controller and this display floater,
Described source electrode driver mutually concatenates, and according to this view data crossfire produce described source drive signal with
Drive this display floater；And
Multiple gate drivers, couple this clock controller and this display floater, in order to produce multiple grid
Drive signal to drive this display floater.
10. the control method of the driving signal polarity of a source electrode driver, it is adaptable to liquid crystal display, bag
Include:
Receive view data crossfire or data output input indicative signal；
Exported in input indicative signal by this view data crossfire or this data and parse Polarity Control information；
And
The multiple source drive letter received and produce to determine this source electrode driver according to this Polarity Control information
Number driving polarity.
11. control methods driving signal polarity as claimed in claim 10, wherein receive this picture number
The step exporting input indicative signal according to crossfire or this data includes:
These data output input indicative signal is received by clock controller or prime source electrode driver.
12. control methods driving signal polarity as claimed in claim 11, wherein by this view data
The step parsing this Polarity Control information in crossfire or this data output input indicative signal includes:
The startup time according to the data output input marker pulse calculating these data output input indicative signal
Point is to parse this Polarity Control information.
13. control methods driving signal polarity as claimed in claim 11, wherein by this view data
The step parsing this Polarity Control information in crossfire or this data output input indicative signal includes:
Carry out for the signal of proximity data output input marker pulse on these data output input indicative signal
Decoding is to obtain this Polarity Control information.
14. control methods driving signal polarity as claimed in claim 13, the most also include:
Receive this Polarity Control information and port number information, and for this Polarity Control information and this lead to
Number of channels information carries out computing to produce the secondary Polarity Control information of secondary source driver；And
Carrying out coding for this secondary Polarity Control information makes this secondary Polarity Control information carry at secondary progression
According to exporting on input indicative signal, and this secondary data output input indicative signal is sent to this secondary source
Driver.
15. control methods driving signal polarity as claimed in claim 10, wherein by this view data
The step parsing this Polarity Control information in crossfire or this data output input indicative signal includes:
Received this view data crossfire by clock controller, and for this view data crossfire be decoded with
Obtain this Polarity Control information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510051591.XA CN105989809B (en) | 2015-02-02 | 2015-02-02 | Liquid crystal display, source electrode driver and the polar control method of its driving signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510051591.XA CN105989809B (en) | 2015-02-02 | 2015-02-02 | Liquid crystal display, source electrode driver and the polar control method of its driving signal |
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| CN105989809A true CN105989809A (en) | 2016-10-05 |
| CN105989809B CN105989809B (en) | 2019-01-18 |
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| CN101640651A (en) * | 2008-07-31 | 2010-02-03 | 索尼株式会社 | Information processing device and signal processing method |
| CN102136249A (en) * | 2010-01-25 | 2011-07-27 | 瑞萨电子株式会社 | Display equipment, display panel and the driving method for the display panel |
| CN102968977A (en) * | 2012-12-14 | 2013-03-13 | 深圳市华星光电技术有限公司 | Driving device for controlling polarity reversal of liquid crystal display panel |
| TWI409746B (en) * | 2008-11-14 | 2013-09-21 | Tli Inc | Source driver for reducing layout area |
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| CN1577462A (en) * | 2003-06-30 | 2005-02-09 | Lg.菲利浦Lcd株式会社 | Driving apparatus for liquid crystal display |
| US20080259061A1 (en) * | 2007-04-18 | 2008-10-23 | Novatek Microelectronics Corp. | Control method for eliminating deficient display and a display device using the same and driving circuit using the same |
| CN101640651A (en) * | 2008-07-31 | 2010-02-03 | 索尼株式会社 | Information processing device and signal processing method |
| TWI409746B (en) * | 2008-11-14 | 2013-09-21 | Tli Inc | Source driver for reducing layout area |
| CN102136249A (en) * | 2010-01-25 | 2011-07-27 | 瑞萨电子株式会社 | Display equipment, display panel and the driving method for the display panel |
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