CN101452682A - Driving circuit of display and correlation method thereof - Google Patents
Driving circuit of display and correlation method thereof Download PDFInfo
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- CN101452682A CN101452682A CNA2007101967727A CN200710196772A CN101452682A CN 101452682 A CN101452682 A CN 101452682A CN A2007101967727 A CNA2007101967727 A CN A2007101967727A CN 200710196772 A CN200710196772 A CN 200710196772A CN 101452682 A CN101452682 A CN 101452682A
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Abstract
The invention discloses a drive circuit of a display and a relevant drive method thereof. The drive circuit comprises a data drive circuit and a control unit, wherein the data drive circuit comprises a plurality of drive circuit modules which correspond to a plurality of channels respectively; the control unit is arranged in at least one circuit sub-module of the plurality of the drive circuit modules; when the control unit starts, the control unit controls the circuit sub-module to output an auxiliary display data with a preset gray scale to drive the display; and when the control unit is forbidden, the drive circuit modules drive the display according to raw display data.
Description
Technical field
The present invention especially refers to a kind of driving circuit and correlation technique thereof of LCD insertion black picture about a kind of driving circuit and correlation technique thereof of display.
Background technology
In order to improve the phenomenon of the dynamic smear of LCD (motion blur), the simplest method can be inserted a black picture to reduce dynamic smear between two normal display frames.The known driving method of at present existing many insertion black pictures is widely used, under the design of not changing pixel in the display panel (pixel), the method of inserting the black picture is divided into two sections with frame (Frame) time, wherein first section shows raw image data, and second section demonstration black image data.Yet, under this type of drive, originally to transmit two batches of driving data in a frame time, so can cause central processing unit (CPU) or time schedule controller (TCON) and data bus burden to increase, add that data bus itself also is a very device of power consumption, therefore adopt the method meeting power consumption a lot.
Summary of the invention
Therefore one of purpose of the present invention be to provide a kind of LCD to insert the driving circuit and the correlation technique thereof of black picture, to solve the above problems.
According to one embodiment of the invention, a kind of driving circuit of display includes: a data drive circuit, and it includes a plurality of drive circuit modules corresponding a plurality of passages respectively; One control module, be arranged in these a plurality of drive circuit modules at least one driving circuit submodule, and when this control module was enabled, this control module was controlled the auxiliary video data that the output of this driving circuit submodule has a predetermined gray scale and is driven this display; And when this control module forbidding, this drive circuit module drives this display according to a raw display data.
According to one embodiment of the invention, a kind of driving method of display includes: a data drive circuit is provided, and it includes a plurality of drive circuit modules corresponding a plurality of passages respectively; In these a plurality of drive circuit modules, at least one driving circuit submodule a control module is set; When this control module is enabled, use this control module to control the auxiliary video data that the output of this driving circuit submodule has a predetermined gray scale and drive this display; And when this control module forbidding, use this drive circuit module to drive this display according to a raw display data.
According to driving circuit provided by the present invention and driving method thereof, only need transmit a collection of driving data (that is raw display data) sweep time of a sweep trace originally, therefore can not increase the burden of the data bus of central processing unit, compare with the driving method of known black plug look picture, the present invention can reduce the power consumption of central processing unit or time schedule controller (TCON) and data bus.
Description of drawings
Fig. 1 is the synoptic diagram of a data drive circuit of the embodiment of the invention.
Fig. 2 is integrated in the circuit diagram of level shifter for control module.
Fig. 3 is the annexation figure of display pannel interior pixel and data drive circuit.
Figure 4 shows that the relative level synoptic diagram of the voltage of driving circuit.
Fig. 5 is the control signal figure of data drive circuit and scan drive circuit.
Fig. 6 is the control signal figure of Fig. 5 at time T 1, T2 and T4.
The control signal figure that Figure 7 shows that among Fig. 5 in time T 3.
Fig. 8 is the control signal figure of Fig. 5 in time T 5.
Fig. 9 is integrated in the first embodiment circuit diagram of buffer amplifier for control module.
Figure 10 is integrated in the second embodiment circuit diagram of buffer amplifier for control module.
Figure 11 is applied in the synoptic diagram of an inversion driving for the present invention.
The main element symbol description
100 data drive circuits
110 drive circuit modules
111,112 data registers (circuit submodule)
114 level shifters (circuit submodule)
115 control modules
116 digital to analog converters
(circuit submodule)
118 buffer amplifiers (circuit submodule)
130 scan drive circuits
140 display pannels
M1, M2, M3, M4, M5, M6, M7, M8, M9, M10, M11, M12, M13, M14 transistor
Embodiment
Please refer to Fig. 1, Fig. 1 is the synoptic diagram of a data drive circuit 100 of the embodiment of the invention.As shown in Figure 1, data drive circuit 100 includes a plurality of drive circuit modules 110 that correspond to a plurality of passages (channel) respectively, wherein each drive circuit module 110 all includes a plurality of circuit submodules, these a plurality of circuit submodules are respectively two data registers (Data Latch) 111 and 112, one level shifter (Level shifter) 114, circuit units such as one digital to analog converter 116 and a buffer amplifier 118, wherein level shifter 114 includes a control module 115 in addition, and the control module 115 of each drive circuit module 110 is accepted an identical control signal CON in the data drive circuit 100.In addition, data drive circuit 100 is coupled to a display pannel 140 and scan driving circuit 130, be used for transmitting a plurality of video data output channels (Output Channel) S1, S2 corresponding to a plurality of drive circuit modules 110 ..., SN is to display pannel 140, and when control signal CON connects, the function that notice scan drive circuit 130 is enabled one scan line standard-sized sheet GON.
On real the work, control module 115 is integrated in a plurality of circuit submodules in the drive circuit module 110
(in the present embodiment, control module 115 is integrated in level shifter 114), be used for receiving a control signal and enable (enable) or forbidding (disable) control module 115, in the present embodiment, when if control module is activated, an auxiliary video data that uses control module 115 to come 110 outputs of control Driver Circuit module to have a predetermined gray scale drives this display; And when control module 115 is not activated, use drive circuit module 110 to drive this display according to a raw display data.
Please refer to Fig. 2, Fig. 2 is integrated in the circuit diagram of level shifter 114 for control module 115.As shown in Figure 2, control module 115 is a selector switch in the present embodiment, can optionally connect setting (set) switch or according to the polarity (polarity) of this raw display data and reset fixed (reset) switch, with the auxiliary video data (in the present embodiment, this predetermined gray scale be zero gray scale) of output to being scheduled to gray scale.As shown in Figure 2, level shifter 114 includes a plurality of transistor M1, M2, M3, M4, M5, M6, M7, M8, M9, M10, M11, M12, M13, M14 and a plurality of voltage source V _ DIG, VOUT and VGND, be used for will input the voltage level of digital signal Vin draw high, wherein the voltage range of Vin generally is about 0V-1.8V, and the scope of output digital signal OUT and OUT_B then is about 0V-6V; To illustrate that below level shifter 114 setting or reseting when deciding switch connection, the variation of each voltage on time shaft.
Fig. 3 is the annexation figure of display pannel 140 interior pixels and data drive circuit 100.As shown in Figure 3, lifting a pixel is example, when sweep trace is connected (that is the transistor M1 in the corresponding pixel connects), the drive circuit module 110 of data drive circuit 100 transmits video data output channel S1 to corresponding pixel, make the voltage on the pixel electrode SOURCE equal the video data that drive circuit module 110 transmits, after decide the shown gray-scale value of pixel by the voltage difference between pixel electrode SOURCE and the common electrode VCOM again.
The circuit application of level shifter 114 shown in Figure 2 is in the driving circuit that two common electrode voltages are arranged, Figure 4 shows that the relative level synoptic diagram of the voltage of driving circuit, the descending VGH that is respectively of the voltage of its driving circuit, VCOMH, V0, V1, V2, ..., Vn, VCOML, VGL, the voltage (that is voltage of pixel gates) of sweep trace when wherein VGH is the sweep trace connection, VCOMH is one first common electrode voltage, V0, V1, V2, ..., Vn then is respectively driving voltage corresponding to each gray scale (that is drive circuit module 110 exported magnitude of voltage), VCOML is one second common electrode voltage, and VGL is the voltage of sweep trace sweep trace when turn-offing.
Fig. 5 is the control signal figure of data drive circuit 100 and scan drive circuit 130.In time T 1, T2 and T4, display is exported an original display picture, that is data drive circuit 100 drives this display with scan drive circuit 130 according to a raw display data; And in time T 3 and T5, the auxiliary video data (that is video data of corresponding black color range) of data drive circuit 100 outputs zero gray scale drives this display.Fig. 6 is the control signal figure of Fig. 5 at time T 1, T2 and T4, as shown in Figure 6, Gz-1, Gz and Gz+1 represent three continuous scanning-line signals respectively, POL represents polar signal, SOURCE is the voltage of remarked pixel electrode then, that is the drive signal that drive circuit module 110 is exported in the data drive circuit 100, VCOM then represents electrode voltage altogether.In addition, in this example, have only a sweep trace to connect at one time, and the voltage level of POL and VCOM is for oppositely (that is when POL was high level, the magnitude of voltage of VCOM was VCOML; And when POL was low level, the magnitude of voltage of VCOM was VCOMH).Control signal figure shown in Figure 6 is the sequential chart of known control signal, knows this skill person and can understand its content easily, does not therefore repeat them here.
Please refer to Fig. 7, the control signal figure that Figure 7 shows that among Fig. 5 in time T 3.In time T shown in Figure 53, sweep trace standard-sized sheet GON function and configuration switch SET shown in Figure 2 are connection.As shown in Figure 7, all scanning-line signal G1, G2 ..., the voltage of GM is VGH (that is sweep trace connection), the voltage of polar signal POL is high level, and the voltage of common electrode voltage VCOM is VCOML.Because configuration switch SET shown in Figure 2 is for connecting, therefore for six supplied with digital signal Vin, output digital signal OUT shown in Figure 2 is " 111111 ", that is corresponding to voltage V0.At this moment, the pixel electrode voltage SOURCE of the corresponding pixel voltage difference of electrode voltage VCOM together is a maximal value, and therefore for the display of a normal bright attitude (normally white), each pixel is zero gray scale (that is black picture).
Similarly, when the voltage of above-mentioned polar signal POL is high level, and the voltage of common electrode voltage VCOM then will be connected shown in Figure 2 reseting and decide switch RESET to produce the black picture when being VCOML.Fig. 8 is for being the control signal figure of Fig. 5 in time T 5.In time T shown in Figure 55, sweep trace standard-sized sheet GON function and shown in Figure 2 reseting are decided switch RESET for connecting.As shown in Figure 8, all scanning-line signal G1, G2 ..., the voltage of GM is VGH (that is sweep trace connection), the voltage of polar signal POL is low level, and the voltage of common electrode voltage VCOM is VCOMH.Because shown in Figure 2 reseting decided switch RESET for connecting, therefore for six supplied with digital signal Vin, output digital signal OUT shown in Figure 2 is " 000000 ", that is corresponding to voltage Vn.At this moment, the pixel electrode voltage SOURCE of the corresponding pixel voltage difference of electrode voltage VCOM together is a maximal value, and therefore for the display of a normal bright attitude, each pixel is zero gray scale (that is black picture).
Above-mentioned use configuration switch SET and reset and decide switch RESET and come switch driving circuit module 110 to export the video data of one zero gray scales according to polar signal POL, that is do not need to change other signals (for example common electrode voltage VCOM or polar signal POL etc.) and just can produce (insertion) black picture.
In addition, in the present embodiment, sweep trace standard-sized sheet GON function is used for allowing simultaneously whole image show the video data of black, yet, under the consideration of some factor, sweep trace and being not suitable for is all connected simultaneously or whole image is not suitable for showing simultaneously the video data of zero gray scale, therefore sweep trace standard-sized sheet GON function can decide the quantity that needs to connect sweep trace according to deviser's consideration, for instance, display screens can be divided into three zones, a son is only connected sweep traces all in the zone to show the black picture in this zone; Or be that at one time, odd-numbered scan lines is all connected via the design of display pannel two ends input at the input signal of sweep trace, and in next time, the even-line interlace line is all connected.Variation spirit also according to the invention in these designs.
Above-mentioned control module 115 is integrated in the digital displaying data (that is above-mentioned " 111111 " or " 000000 ") that level shifter 114 is used for producing one zero gray scales, yet control module 115 also can be integrated in the simulation video data (that is directly exporting V0 or Vn) to produce one zero gray scales in the buffer amplifier 118.Fig. 9 is integrated in the circuit diagram of first embodiment of buffer amplifier 118 for control module 115.As shown in Figure 9, control module 115 is integrated in the output terminal of buffer amplifier 118, wherein the output terminal of buffer amplifier 118 is connected to configuration switch SET respectively, resets and decide switch RESET and setting/reset and decide switch S ET/RESET, and configuration switch SET is connected to the voltage source with voltage V0, decides switch RESET and is connected to the voltage source with voltage Vn and reset.In the present embodiment, configuration switch SET and to reset the connection of deciding switch RESET identical with the embodiment that above-mentioned control module 115 is integrated in level shifter 114, POL decides according to polar signal.When configuration switch SET connects, set/reset and decide switch S ET/RESET and turn-off, and the output voltage of buffer amplifier 118 is voltage V0, this moment buffer amplifier 118 output voltage together the voltage difference of electrode voltage VCOM (having voltage VCOML) be a maximal value; When reseting when deciding switch RESET and connecting, set/reset and decide switch S ET/RESET and turn-off, and the output voltage of buffer amplifier 118 is voltage Vn, this moment buffer amplifier 118 output voltage together the voltage difference of electrode voltage VCOM (having voltage VCOMH) be a maximal value, therefore for the display of a normal bright attitude, each pixel is zero gray scale (that is black picture).
Similarly, control module 115 also can be integrated in the input end of buffer amplifier 118.Figure 10 is integrated in the circuit diagram of second embodiment of buffer amplifier 118 for control module 115.As shown in figure 10, control module 115 is integrated in the input end of buffer amplifier 118, wherein the input end of buffer amplifier 118 is connected to configuration switch SET respectively, resets and decide switch RESET and setting/reset and decide switch S ET/RESET, and configuration switch SET is connected to the voltage source with voltage V0, decides switch RESET and is connected to the voltage source with voltage Vn and reset.The method of operating of output terminal that the method for operating of present embodiment and control module 115 shown in Figure 9 are integrated in buffer amplifier 118 is identical, those skilled in the art should be applied in the present embodiment easily according to above-mentioned instruction of the present invention, so details does not repeat them here.
Be noted that the foregoing description all is the displays that are applied to normal bright attitude, yet by variation on some circuit components or the adjustment on the voltage, the present invention also can be applicable to the display of black attitude often.
In addition, when display is to use counter-rotating (dot inversion) driving or line counter-rotating (lineinversion) to drive, common electrode voltage is a fixed value (that is having only a common electrode magnitude of voltage), and the present invention can also be applied under this type of drive.Figure 11 is applied in the synoptic diagram of an inversion driving for the present invention.As shown in figure 11, when time T 1 and T3, drive circuit module 110 receives a control signal to produce the video data of zero gray scale according to polar signal POL.It is similar to produce the mode of video data of zero gray scale and Fig. 2 and embodiment shown in Figure 9, and those skilled in the art should be applied in the present embodiment easily according to above-mentioned instruction of the present invention, so details does not repeat them here.
The simple above-mentioned driving circuit that is applied to display and associated method of concluding, in the present invention, a data drive circuit includes a plurality of drive circuit modules corresponding a plurality of passages respectively, and each drive circuit module includes a plurality of circuit units; And in each drive circuit module, in the identical circuit unit control module is set, and all control modules are accepted identical control signal, and when this control module was enabled, this control module was controlled the auxiliary video data that the output of this drive circuit module has a predetermined gray scale and is driven this display; And when this control module forbidding, this drive circuit module drives this display according to a raw display data.
The above only is preferred embodiment of the present invention, and all equivalences of carrying out according to claim of the present invention change and revise, and all should belong to covering scope of the present invention.
Claims (18)
1. the driving method of a display, it includes:
One data drive circuit is provided, and it includes a plurality of drive circuit modules corresponding a plurality of passages respectively;
In at least one circuit submodule in these a plurality of drive circuit modules in each drive circuit module a control module is set;
When this control module is enabled, use this control module to control the auxiliary video data that the output of this drive circuit module has a predetermined gray scale and drive this display; And when this control module forbidding, use this drive circuit module to drive this display according to a raw display data.
2. driving method as claimed in claim 1, the step that a control module wherein is set at least one circuit submodule in each drive circuit module in these a plurality of drive circuit modules includes: the function same circuits submodule in these a plurality of drive circuit modules in each drive circuit module all is provided with a control module; And this driving method includes in addition:
Produce one and control signal to, control these a plurality of control modules simultaneously and enable or forbid a plurality of control modules that should a plurality of drive circuit modules.
3. driving method as claimed in claim 1, wherein this control module is a selector switch, is used for optionally exporting one first auxiliary video data or one second auxiliary video data to being scheduled to gray scale according to the polarity of this raw display data.
4. driving method as claimed in claim 1, wherein this drive circuit module includes at least one data register, a level shifter, a digital to analog converter and a buffer amplifier, and this control module is integrated in this data register, this level shifter, this digital to analog converter or this buffer amplifier.
5. driving method as claimed in claim 1, wherein when this control module was enabled, at least one sweep trace was connected.
6. driving method as claimed in claim 1, wherein when this control module was enabled, all sweep trace was all connected.
7. driving method as claimed in claim 1, wherein when this control module was enabled, odd-numbered scan lines was all connected.
8. driving method as claimed in claim 1, wherein when this control module was enabled, the even-line interlace line was all connected.
9. driving method as claimed in claim 1 should predetermined gray scale be one zero gray scales wherein, made display picture present black.
10. the driving circuit of a display, it includes:
One data drive circuit, it includes a plurality of drive circuit modules corresponding a plurality of passages respectively; And
One control module, be arranged at least one circuit submodule in each drive circuit module in these a plurality of drive circuit modules, and when this control module was enabled, this control module was controlled the auxiliary video data that the output of this drive circuit module has a predetermined gray scale and is driven this display; And when this control module forbidding, this drive circuit module drives this display according to a raw display data.
11. driving circuit as claimed in claim 10, wherein at least one function same circuits submodule in each drive circuit module all is provided with a control module in these a plurality of drive circuit modules, and a plurality of control modules that should a plurality of drive circuit modules are received a control signal, control these a plurality of control modules simultaneously and enable or forbid.
12. driving circuit as claimed in claim 10, wherein this control module is a selector switch, is used for optionally exporting one first auxiliary video data or one second auxiliary video data to being scheduled to gray scale according to the polarity of this raw display data.
13. driving circuit as claimed in claim 10, wherein this drive circuit module includes at least one data register, a level shifter, a digital to analog converter and a buffer amplifier, and this control module is integrated in this data register, this level shifter, this digital to analog converter or this buffer amplifier.
14. driving circuit as claimed in claim 10, wherein when this control module was enabled, at least one sweep trace was connected.
15. driving circuit as claimed in claim 10, wherein when this control module was enabled, all sweep trace was all connected.
16. driving circuit as claimed in claim 10, wherein when this control module was enabled, odd-numbered scan lines was all connected.
17. driving circuit as claimed in claim 10, wherein when this control module was enabled, the even-line interlace line was all connected.
18. driving circuit as claimed in claim 10 should predetermined gray scale be one zero gray scales wherein, made display picture present black.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101967727A CN101452682A (en) | 2007-12-06 | 2007-12-06 | Driving circuit of display and correlation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101967727A CN101452682A (en) | 2007-12-06 | 2007-12-06 | Driving circuit of display and correlation method thereof |
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| CN101452682A true CN101452682A (en) | 2009-06-10 |
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| CNA2007101967727A Pending CN101452682A (en) | 2007-12-06 | 2007-12-06 | Driving circuit of display and correlation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101950520A (en) * | 2010-08-25 | 2011-01-19 | 友达光电股份有限公司 | Level shifter, generation method of clock output signal and plane display device thereof |
| CN102201209A (en) * | 2010-03-25 | 2011-09-28 | 三星电子株式会社 | Display device and driving method thereof |
| CN102414732A (en) * | 2009-11-12 | 2012-04-11 | 松下电器产业株式会社 | Drive voltage generation circuit |
| CN104217691A (en) * | 2014-08-28 | 2014-12-17 | 京东方科技集团股份有限公司 | Data driving circuit, display panel driving method and display device |
| CN105161068A (en) * | 2015-10-19 | 2015-12-16 | 昆山龙腾光电有限公司 | Driving chip for display device and display device |
| WO2016165178A1 (en) * | 2015-04-15 | 2016-10-20 | 深圳市华星光电技术有限公司 | Source driver and liquid crystal display |
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- 2007-12-06 CN CNA2007101967727A patent/CN101452682A/en active Pending
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| CN102414732B (en) * | 2009-11-12 | 2015-05-06 | 松下电器产业株式会社 | Drive voltage generation circuit |
| CN102414732A (en) * | 2009-11-12 | 2012-04-11 | 松下电器产业株式会社 | Drive voltage generation circuit |
| US9024920B2 (en) | 2009-11-12 | 2015-05-05 | Panasonic Intellectual Property Management Co., Ltd. | Drive voltage generator |
| CN102201209A (en) * | 2010-03-25 | 2011-09-28 | 三星电子株式会社 | Display device and driving method thereof |
| KR20110107581A (en) * | 2010-03-25 | 2011-10-04 | 삼성전자주식회사 | Display device and driving method thereof |
| KR101698570B1 (en) | 2010-03-25 | 2017-01-23 | 삼성디스플레이 주식회사 | Display device and driving method thereof |
| US9373298B2 (en) | 2010-03-25 | 2016-06-21 | Samsung Display Co., Ltd. | Display device and driving method thereof |
| CN101950520B (en) * | 2010-08-25 | 2012-12-26 | 友达光电股份有限公司 | Level shifter, generation method of clock output signal and plane display device thereof |
| CN101950520A (en) * | 2010-08-25 | 2011-01-19 | 友达光电股份有限公司 | Level shifter, generation method of clock output signal and plane display device thereof |
| CN104217691A (en) * | 2014-08-28 | 2014-12-17 | 京东方科技集团股份有限公司 | Data driving circuit, display panel driving method and display device |
| US9514702B2 (en) | 2014-08-28 | 2016-12-06 | Boe Technology Group Co., Ltd. | Source driver circuit, method for driving display panel and display device |
| WO2016165178A1 (en) * | 2015-04-15 | 2016-10-20 | 深圳市华星光电技术有限公司 | Source driver and liquid crystal display |
| GB2553240A (en) * | 2015-04-15 | 2018-02-28 | Shenzhen China Star Optoelect | Source driver and liquid crystal display |
| EA033532B1 (en) * | 2015-04-15 | 2019-10-31 | Shenzhen China Star Optoelect | Source drive and lcd device |
| GB2553240B (en) * | 2015-04-15 | 2021-11-24 | Shenzhen China Star Optoelect | Source drive and LCD device |
| CN105161068A (en) * | 2015-10-19 | 2015-12-16 | 昆山龙腾光电有限公司 | Driving chip for display device and display device |
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Open date: 20090610 |