CN105989809B - Liquid crystal display, source driver and control method of driving signal polarity of liquid crystal display - Google Patents
Liquid crystal display, source driver and control method of driving signal polarity of liquid crystal display Download PDFInfo
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- CN105989809B CN105989809B CN201510051591.XA CN201510051591A CN105989809B CN 105989809 B CN105989809 B CN 105989809B CN 201510051591 A CN201510051591 A CN 201510051591A CN 105989809 B CN105989809 B CN 105989809B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000003550 marker Substances 0.000 claims description 12
- VEMKTZHHVJILDY-UHFFFAOYSA-N resmethrin Chemical compound CC1(C)C(C=C(C)C)C1C(=O)OCC1=COC(CC=2C=CC=CC=2)=C1 VEMKTZHHVJILDY-UHFFFAOYSA-N 0.000 description 20
- 238000010586 diagram Methods 0.000 description 19
- 239000008186 active pharmaceutical agent Substances 0.000 description 11
- 102100022307 DNA polymerase alpha catalytic subunit Human genes 0.000 description 6
- 102100032501 Death-inducer obliterator 1 Human genes 0.000 description 6
- 101000902558 Homo sapiens DNA polymerase alpha catalytic subunit Proteins 0.000 description 6
- 101000869896 Homo sapiens Death-inducer obliterator 1 Proteins 0.000 description 6
- 101001053773 Homo sapiens Type I iodothyronine deiodinase Proteins 0.000 description 6
- 101150046160 POL1 gene Proteins 0.000 description 5
- 101100117436 Thermus aquaticus polA gene Proteins 0.000 description 5
- 230000009471 action Effects 0.000 description 5
- 102100022302 DNA polymerase beta Human genes 0.000 description 4
- 101000902539 Homo sapiens DNA polymerase beta Proteins 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 102100036262 DNA polymerase alpha subunit B Human genes 0.000 description 3
- 101000930855 Homo sapiens DNA polymerase alpha subunit B Proteins 0.000 description 3
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- 230000008901 benefit Effects 0.000 description 2
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- 238000009790 rate-determining step (RDS) Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
A liquid crystal display, a source driver and a control method of driving signal polarity thereof. The source driver includes a signal receiving interface, a decoder, and a controller. The signal receiving interface receives an image data stream or a data output input indication signal. The decoder analyzes the polarity control information from the image data stream or the data output/input indication signal. The controller receives and determines the driving polarities of a plurality of driving signals generated by the source driver according to the polarity control information.
Description
Technical field
The present invention relates to a kind of liquid crystal display, source electrode driver and the polar control method of its driving signal, and it is special
It is not related to a kind of polar control method of driving signal for being not required to increase additional pin on source electrode driver.
Background technique
In technical field now, the order of polarity of horizontal double-point inversion (horizontal two dots, H2DOT)
Can be primary for every four channel cycles, Figure 1A, Figure 1B are please referred to, Figure 1A and Figure 1B are painted the source drive signal of known technology
Polarity control mode schematic diagram.In figure 1A, the source electrode driver 110 and 120 mutually concatenated distinguishes receiving polarity control
Information POLA and POLB controls the polarity of its generated source drive signal, wherein polarity control information POLA and
POLB can be the digital signal with N, and use control source electrode driver 110 and 120 to generate a variety of source drives
The possibility of the order of polarity of signal.According to Figure 1B, the driving channel provided by source electrode driver 110 and 120 is not times for 4
Under conditions of number, the polarity of the source drive signal in juncture area ITZ to make source electrode driver 110 and 120 is maintained
+ ,-,-,+variation sequence, change in polarity caused by source electrode driver 120 need it is not identical as source electrode driver 110, as
When opening horizontal double-point inversion, the polarity discontinuous problem of generation.
In addition, in recent known art, be commonly in red, green, blue, on white (RGBW) panel using one kind every eight
The inversion technique of the primary H4Inversion of a channel cycle come solve pure color polarity it is identical caused by image flicker
(Flicker) the phenomenon that, as shown in Figure 1 C, Fig. 1 C, are painted the polarity control mode of the source drive signal of another known technology
Schematic diagram.Therefore, when driving total number of channels is not the multiple for 8, it can also occur that polarity as described above is discontinuous to ask
Topic.
Based on above-mentioned explanation, in the display of known technology, in order to can carry out horizontal double-point inversion mechanism and on
The H4Inversion inversion mechanism stated is received respectively by configuring additional pin on source electrode driver 110 and 120
Different polarity controls information POLA and POLB.The pin for the source driver chip that such practice can make increases, and makes
The layout area of source driver chip increases and increases circuit cost.Also, it is driven to provide polarity control signal to source electrode
On the additional pin of dynamic device chip, it is also desirable to be laid out additional transfer wire, equally cause the increase of production cost.
Summary of the invention
The present invention provides a kind of liquid crystal display, source electrode driver and the polar control method of its driving signal, can not
It needs that more pins is arranged to carry out the polarity control action of driving signal in source electrode driver.
Source electrode driver of the invention is suitable for a liquid crystal display, and source electrode driver includes signal receiving interface, decoding
Device and controller.Signal receiving interface receives image data crossfire or data export input indicative signal.Decoder coupling letter
Number receiving interface, and by parsing polarity control information in image data crossfire or data output input indicative signal.Controller
Decoder is coupled, receive and controls information according to polarity to determine the driving stage of multiple driving signals of source electrode driver generation
Property.
Liquid crystal display of the invention includes display panel, clock controller, gate drivers and foregoing source
Driver.Source electrode driver coupling clock controller and display panel, source electrode driver mutually concatenate, and according to picture number
Driving signal is generated according to crossfire to drive display panel.Gate drivers couple clock controller and display panel, and generate
Gate drive signal drives display panel.
The polar control method of the driving signal of source electrode driver of the invention includes: to receive image data crossfire or data
Export input indicative signal；By parsing polarity control information in image data crossfire or data output input indicative signal；With
And receive and determine according to polarity inversion information the driving polarity for multiple driving signals that source electrode driver generates.
Based on above-mentioned, the present invention is by controlling information carry in image data crossfire or data output input instruction for polarity
In signal, and is acted by the transmission that existing image data crossfire or data export input indicative signal and polarity is controlled into information
It is transferred in source electrode driver.In this way, which source electrode driver can not needed using extra pin come receiving polarity control
Information can also effectively carry out the polarity control action of its driving signal, cost needed for circuit is effectively reduced.
To make the foregoing features and advantages of the present invention clearer and more comprehensible, special embodiment below, and it is detailed to cooperate attached drawing to make
Carefully it is described as follows.
Detailed description of the invention
Figure 1A, Figure 1B and Fig. 1 C are painted the schematic diagram of the polarity control mode of the source drive signal of a variety of known technologies.
Fig. 2 is painted the schematic diagram of the source electrode driver of the embodiment of the present invention.
Fig. 3 is painted the schematic diagram of the source electrode driver of another embodiment of the present invention.
Fig. 4 is painted the waveform diagram of the data output input indicative signal DIO of the embodiment of the present invention.
Fig. 5 is painted the schematic diagram of the source electrode driver of yet another embodiment of the invention.
Fig. 6 A and Fig. 6 B are painted the schematic diagram of the carry mode of the polarity control information of the embodiment of the present invention respectively.
Fig. 7 is painted the schematic diagram of the more source electrode driver of an embodiment of the invention.
The schematic diagram of the carry mode of the polarity control information for the embodiment of the present invention that Fig. 8 is painted.
Fig. 9 is painted the schematic diagram of the liquid crystal display 900 of one embodiment of the invention.
Figure 10 is painted the polar control method of driving signal 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: counter
230,330,530,730: controller
301,701: prime source electrode driver
540: arithmetic unit
550: encoder
702,920: clock controller
900: liquid crystal display
910: display panel
941~94M: gate drivers
DS: image data crossfire
DIO: data export input indicative signal
SDRV: source drive signal
POL, POLA, POLB, POLA1, POLA2: polarity controls information
ITZ: juncture area
PW: data output input marker pulse
TS: time point
DIO1: secondary data exports input indicative signal
CN: port number information
POL1: secondary polarity controls information
IDATA1, IDATA2: image data
RST: pulse
S1010~S1030: the polar rate-determining steps of driving signal
Specific embodiment
Referring to figure 2., Fig. 2 is painted the schematic diagram of the source electrode driver of the embodiment of the present invention.Source electrode driver 200 includes letter
Number receiving interface 210, decoder 220 and controller 230.Signal receiving interface 210 can be used to receive image data crossfire DS
Or data export input indicative signal DIO.Wherein, image data crossfire DS can be by clock controller in liquid crystal display
(Timing controller, TCON) is transmitted, and is received by signal receiving interface 210, and data output input instruction letter
Number DIO then can be by clock controller or the source electrode driver of prime come to send, and is received by signal receiving interface 210.Figure
As including liquid crystal display image data to display in data stream DS, and data output input indicative signal DIO is then used
To indicate that source electrode driver 200 will be received or be transmitted the temporal information of data.
Decoder 220 couples signal receiving interface 210.Decoder 220 is by image data crossfire DS or data output input
Polarity control information POL is parsed in indication signal DIO.Controller 230 then couples decoder 220, and 220 institute of Rcv decoder
The polarity of acquisition controls information POL.Controller 230 simultaneously controls information POL according to polarity to determine produced by source electrode driver 200
Multiple source drive signal SDRV driving polarity, and use setting source drive signal SDRV driving order of polarity, and
Make the driving signal order of polarity of source electrode driver 200 that can meet the need such as horizontal double-point inversion and H4Inversion inversion mechanism
It asks.
In embodiments of the present invention, polarity control information POL is by carry in image data crossfire DS or data output input
In indication signal DIO, in this way, which source electrode driver 200 can be using signal receiving interface 210 come by the figure that there is originally
Information POL is controlled as obtaining polarity in data stream DS or data output input indicative signal DIO, that is to say, that source drive
Device 200 does not need to control information POL by the way that additional pin is arranged come receiving polarity, and the cost of circuit is effectively reduced.
Below referring to figure 3., Fig. 3 is painted the schematic diagram of the source electrode driver of another embodiment of the present invention.In Fig. 3, source
Driver 300 is connected to prime source electrode driver 301.Source electrode driver 300 includes signal receiving interface 310, counter 320
And controller 330.Source electrode driver 300 receives data output by prime source electrode driver 301 by signal receiving interface 310
Input indicative signal DIO, and data output input indicative signal DIO is sent to counter 320.
In the specification of Low Voltage Differential Signal interface specification (mini-LVDS), counter 320 can be defeated by enumeration data
The starting time of input indicative signal DIO judges the number of channels of prime source electrode driver 301 out.That is, passing through
The starting time of enumeration data output input indicative signal DIO may determine that prime source electrode driver 301 and source drive
The polarization state of the driving signal of 300 intersection of device.Also, it is driven by known prime source electrode driver 301 and source electrode
The polarization state of the driving signal of dynamic 300 intersection of device can be obtained further according to count results caused by counter 320
It obtains polarity and controls information POL.
In the acquisition details of the starting time about data output input indicative signal DIO, referring to figure 4., Fig. 4 is painted
The waveform diagram of the data output input indicative signal DIO of the embodiment of the present invention.Data output input indicative signal DIO has
One data output input marker pulse PW, and data output input indicative signal DIO the starting time can be data output it is defeated
Enter the time point of marker pulse PW generation, that is, data export the time of input indicative signal DIO transition to high logic level
Point TS.Counter 320 can start counting action when source electrode driver 300 is reset, and complete to count in time point TS and move
Make, pass through count results caused by counting action, so that it may learn that polarity controls information POL.Subsidiary one mentions, counter
320 can reset according to the 300 received horizontal synchronizing signal (HSYNC) of institute of source electrode driver and restart counting action.
Please referring again to Fig. 3, polarity obtained control information POL is sent to controller 330 by counter 320.In this way,
Controller 330 can control information POL according to polarity to set the polar sequence of driving of generated source drive signal SDRV.
In addition, controller 330 can control the port number of the driving signal of information POL and source electrode driver 300 according to polarity to produce
Raw secondary data exports input indicative signal DIO1, and sends secondary data output input indicative signal DIO1 to secondary source
Driver.
Secondary data output input indicative signal DIO1 can be used to notify secondary source electrode driver about source electrode driver
300 and secondary source electrode driver intersection source drive signal change in polarity state, make secondary source electrode driver
The change in polarity sequence of its generated source drive signal can be set accordingly.
Below referring to figure 5., Fig. 5 is painted the schematic diagram of the source electrode driver of yet another embodiment of the invention.In Fig. 5, source
Driver 500 includes signal receiving interface 510, decoder 520, controller 530, arithmetic unit 540 and encoder 550.Letter
Number receiving interface 510 receives data and exports input indicative signal DIO, and decoder 520 is used to parse carry and exports in data
Polarity in input indicative signal DIO controls information POL.Controller 530 then can control information POL according to polarity to set source electrode
The order of polarity of driving signal SDRV.
It is noted that source electrode driver 500 further includes arithmetic unit 540 and encoder in the embodiment of the present invention
550.540 receiving polarity of arithmetic unit controls the port number information CN of information POL and source electrode driver 500, and is directed to polarity control
Information POL and port number information CN processed carry out operation to generate secondary polarity control information POL1.Encoder 550 is coupled to fortune
Calculate device 540, and to receive secondary polarity control information POL1, and carry out coding for secondary polarity control information POL1 to make time
Grade polarity control information POL1 carry is on secondary data output input indicative signal DIO1.Encoder 550 and by secondary data
Output input indicative signal DIO1 is sent to secondary source electrode driver.
Arithmetic unit 540 in the embodiment of the present invention can be adder.
In addition, please referring to the polarity control letter that Fig. 6 A and Fig. 6 B, Fig. 6 A and Fig. 6 B are painted the embodiment of the present invention respectively
The schematic diagram of the carry mode of breath.In fig. 6, polarity control information POL can export input indicative signal in data with carry
Before data output input marker pulse PW on DIO, and input marker pulse PW is exported adjacent to data.Polarity controls information
POL can use serial manner to indicate its information content, and can apply any string well-known to those skilled in the art
The manifestation mode of row data is implemented, not certain limitation.
In fig. 6b, polarity control information POL can be with data output of the carry on data output input indicative signal DIO
After inputting marker pulse PW, and input marker pulse PW is exported adjacent to data.Likewise, polarity control information POL can benefit
Its information content is indicated with serial manner, and can apply the table of any serial data well-known to those skilled in the art
Existing mode is implemented, not certain limitation.
Fig. 7 is please referred to below, and Fig. 7 is painted the schematic diagram of the more source electrode driver of an embodiment of the invention.Source electrode driver
700 are coupled to clock controller 702 and prime source electrode driver 701.Source electrode driver 700 include signal receiving interface 710,
Decoder 720 and controller 730.Source electrode driver 700 receives image data crossfire DS by signal receiving interface 710, and
Information POL is controlled by being coupled to the decoder 720 of signal receiving interface 710 to parse polarity by image data crossfire DS.
Polarity obtained control information POL is then sent to controller 730 by decoder 720.Controller 730 controls information according to polarity
POL sets the driving order of polarity of its generated source drive signal SDRV.
In the present embodiment, corresponding polarity control information (such as polarity controls information POL) at different levels can be by clock control
Device 702 is set in advance, and difference carry is in image data crossfire DS.Then, clock controller 702 is again by each polarity control
Information processed is sent to corresponding source electrode driver (transmission polarity controls information POL to corresponding source electrode driver 700).
About the carry mode of polarity control information POL, the polarity control letter for the embodiment of the present invention that Fig. 8 is painted is please referred to
The schematic diagram of the carry mode of breath.In fig. 8, polarity control information POLA1 and POLA2 can distinguish carry and do not transmitting picture number
According in the standby time section of IDATA1 and IDATA2.For example, in fig. 8, it is sent to the source electrode driver of the first order
Polarity controls information POLA1 by carry before the time interval of the image data IDATA1 of the source electrode driver of the transmission first order,
And it is sent to source drive of the polarity control information POLA2 of the source electrode driver of the second level by carry at first and second grade of transmission
Between the time interval of image data IDATA1, IDATA2 of device.
Subsidiary one mentions, and pulse RST can transmit the reference starting point of data for image data crossfire DS.
Fig. 9 is please referred to below, and Fig. 9 is painted the schematic diagram of the liquid crystal display 900 of one embodiment of the invention.Liquid crystal display
900 include display panel 910,941~94M of clock controller 920,931~93N of source electrode driver and gate drivers.Source
931~93N of driver is coupled to display panel 910 and clock controller 920, and using in aforesaid plurality of embodiment
Source electrode driver is implemented, and is used to generate source electrode driving signal to drive display panel 910.Gate drivers 941~94M coupling
It is connected to display panel 910 and clock controller 920, display panel 910 is driven to generate gate drive signal.Wherein,
941~94M of gate drivers can be implemented using gate drivers well-known to those skilled in the art, not certain limit
System.
It is worth noting that, 931~the 93N of source electrode driver of the present embodiment is not needed to add additional pin and is carried out receiving pole
Property control information, but using existing image data crossfire or data output input indicative signal come receiving polarity control believe
Breath, area needed for circuit is effectively reduced, and then reduce the cost of circuit.
Figure 10 is please referred to below, and Figure 10 is painted the polar control of driving signal of the source electrode driver of one embodiment of the invention
Method.The polar control method of the driving signal of the source electrode driver of the present embodiment is suitable on liquid crystal display, wherein in step
In rapid S1010, receives image data crossfire or data export input indicative signal, also, in step S1020, by picture number
Polarity control information is parsed according to crossfire or data output input indicative signal.Then, it in step S1030, then receives simultaneously
The driving polarity of multiple source drive signals of source electrode driver generation is determined according to polarity control information.
About the implementation detail in above-mentioned steps, have explanation in detail in aforesaid plurality of embodiment and embodiment,
Herein without repeating more.
In conclusion the present invention exports input indicative signal using the existing image data crossfire of source electrode driver or data
Carry out receiving polarity control information, does not need that transfer operation of the additional pin to carry out polarity control information is arranged, be effectively reduced
The circuit cost of source electrode driver promotes the price competitiveness of product.
Claims (11)
1. a kind of source electrode driver is suitable for liquid crystal display, comprising:
Signal receiving interface receives data and exports input indicative signal；
Decoder couples the signal receiving interface, by parsing polarity control information in data output input indicative signal；With
And
Controller couples the decoder, receives and controls information according to the polarity to determine that the source electrode driver generates multiple
The driving polarity of source drive signal.
2. source electrode driver as described in claim 1, wherein the signal receiving interface is driven by clock controller or prime source electrode
Dynamic device sends data output input indicative signal.
3. source electrode driver as claimed in claim 2, wherein the decoder exports input indicative signal according to the data are calculated
Data output input marker pulse starting time point with parse the polarity control information.
4. source electrode driver as claimed in claim 3, further includes:
Counter, couples the signal receiving interface and the controller, which exports the data according to clock signal defeated
The starting time point for entering marker pulse is counted to obtain polarity control information.
5. source electrode driver as claimed in claim 2, wherein the decoder is for adjacent on data output input indicative signal
The signal of nearly data output input marker pulse is decoded to obtain polarity control information.
6. source electrode driver as claimed in claim 5, further includes:
Arithmetic unit receives polarity control information and port number information, and for polarity control information and the port number
Information carries out operation to generate the secondary polarity of secondary source electrode driver and control information；And
Encoder couples the arithmetic unit to receive secondary polarity control information, is compiled for secondary polarity control information
Code makes secondary polarity control information carry on secondary data output input indicative signal, and the secondary data is exported and is inputted
Indication signal is sent to the secondary source electrode driver.
7. a kind of polar control method of the driving signal of source electrode driver is suitable for liquid crystal display, comprising:
It receives data and exports input indicative signal；
By parsing polarity control information in data output input indicative signal；And
It receives and controls information according to the polarity to determine the driving stage of multiple source drive signals of source electrode driver generation
Property.
8. the polar control method of driving signal as claimed in claim 7, wherein receiving data output input indicative signal
The step of include:
Data output input indicative signal is sent by clock controller or prime source electrode driver.
9. the polar control method of driving signal as claimed in claim 8, wherein by data output input indicative signal
Parsing the step of polarity controls information includes:
Starting time point according to the data output input marker pulse for calculating data output input indicative signal is to parse
The polarity controls information.
10. the polar control method of driving signal as claimed in claim 8, wherein by data output input indicative signal
Parsing the step of polarity controls information includes:
It is decoded for the signal of proximity data output input marker pulse on data output input indicative signal to obtain
The polarity controls information.
11. the polar control method of driving signal as claimed in claim 10, wherein further include:
Polarity control information and port number information are received, and is carried out for polarity control information and the port number information
Operation controls information with the secondary polarity for generating secondary source electrode driver；And
Carrying out coding for secondary polarity control information makes secondary polarity control information carry export input in secondary data
In indication signal, and secondary data output input indicative signal is sent to the secondary source electrode driver.
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| CN201510051591.XA CN105989809B (en) | 2015-02-02 | 2015-02-02 | Liquid crystal display, source driver and control method of driving signal polarity of liquid crystal display |
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| CN201510051591.XA CN105989809B (en) | 2015-02-02 | 2015-02-02 | Liquid crystal display, source driver and control method of driving signal polarity of liquid crystal display |
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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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI361422B (en) * | 2007-04-18 | 2012-04-01 | Novatek Microelectronics Corp | Control method for eliminating deficient display and a display device using the same and driving circuit using the same |
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- 2015-02-02 CN CN201510051591.XA patent/CN105989809B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1577462A (en) * | 2003-06-30 | 2005-02-09 | Lg.菲利浦Lcd株式会社 | Driving apparatus for liquid crystal display |
| 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 |
| 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 |
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