CN102890904B - Common electrode driving method, common electrode potential control device and display driving circuit - Google Patents
Common electrode driving method, common electrode potential control device and display driving circuit Download PDFInfo
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- CN102890904B CN102890904B CN201110202120.6A CN201110202120A CN102890904B CN 102890904 B CN102890904 B CN 102890904B CN 201110202120 A CN201110202120 A CN 201110202120A CN 102890904 B CN102890904 B CN 102890904B
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Abstract
The invention discloses a common electrode driving method, a common electrode potential control device and a display driving circuit. The common electrode driving method is used for driving a display and comprises the following steps. Common electrode potential is provided with a common electrode potential switching time unit as a repeat time unit so as to define a voltage reference of the display, wherein the common electrode potential switching time unit has different types of multiple common electrode potential form intervals; the length of each common electrode potential form interval comprises one or more frame lengths; and in the different types of common electrode potential form intervals, the provided common electrode potential respectively has different alternating current voltage swings or direct current voltage levels.
Description
Technical field
The present invention relates to a kind of driving method, particularly relate to a kind of common electrode driving method for display.
Background technology
For the progress rapidly of multimedia society, be mostly indebted to the tremendous progress of semiconductor element or display device.With regard to display, have that high image quality, space efficiency utilization are good, the liquid crystal mesogens display (Liquid Crystal Display) of low consumpting power, the advantageous characteristic such as radiationless becomes the main flow in market gradually.And first it is worth mentioning that at this, with in the driving framework of liquid crystal display now, usually with the driving framework of the common electrode current potential of AC mode (AC mode common voltage) (such as the type of drive of line reversion) drive existing in, undersized display panels (LCD panel), and drive the display panels of existing large-size with the driving framework of the common electrode current potential of DC mode (DC mode common voltage) (such as some reversion a display technique).
But, if with the driving framework of AC mode common electrode current potential drive existing in, undersized display panels time, though the consumed power of liquid crystal display entirety can be caused to reduce, but final the presented picture quality of liquid crystal display can't be very exquisite.In addition, if when driving the display panels of existing large-size with the driving framework of DC mode common electrode current potential, although can improve the picture quality of liquid crystal display, the consumed power of liquid crystal display entirety also can increase thereupon.On the other hand, to promote display quality, also applying with the type of drive of the common electrode current potential of generally fixing AC mode or DC mode and using.
Summary of the invention
The invention provides a kind of polymorphic type common electrode driving method, it is abnormal that it can eliminate display in the mode of dynamic modulation common electrode in same group of display device, promotes display quality.
The invention provides a kind of circuit of display driving, it is abnormal that it can eliminate display in the mode of dynamic modulation common electrode in same group of display device, promotes display quality.
The invention provides a kind of common electrode potential controlling apparatus, it is abnormal that it can eliminate display in the mode of dynamic modulation common electrode in same group of display device, promotes display quality.
The present invention proposes a kind of common electrode driving method, for driving a display.Common electrode driving method comprises the steps.With altogether electrode potential unit switching time be one the repetition time unit, provide common electrode current potential, to define the voltage reference of display.It is interval that common electrode current potential unit switching time has dissimilar multiple common electrode current potential kenels.The time span in each common electrode current potential kenel interval comprises one or more shot length.In dissimilar common electrode current potential kenel interval, the common electrode current potential be provided has the different alternating voltage amplitudes of oscillation respectively or DC voltage position is accurate.
In one embodiment of this invention, in common electrode current potential unit switching time, the common electrode current potential kenel that dissimilar common electrode current potential kenel interval comprises multiple alternating current type is interval, has the different alternating voltage amplitudes of oscillation respectively in be wherein provided common electrode current potential system.
In one embodiment of this invention, in common electrode current potential unit switching time, the common electrode current potential kenel that dissimilar common electrode current potential kenel interval also comprises multiple direct current type is interval, after being arranged in the common electrode current potential kenel interval of multiple alternating current type in proper order, in be wherein provided common electrode current potential, there is different DC voltage positions respectively accurate.
In one embodiment of this invention, in common electrode current potential unit switching time, the common electrode current potential kenel that dissimilar common electrode current potential kenel interval comprises multiple direct current type is interval, has different DC voltage positions respectively accurate in be wherein provided common electrode current potential.
In one embodiment of this invention, in common electrode current potential unit switching time, the common electrode current potential kenel that dissimilar common electrode current potential kenel interval also comprises multiple alternating current type is interval, after being arranged in the common electrode current potential kenel interval of multiple direct current type in proper order, in be wherein provided common electrode current potential, there is the different alternating voltage amplitudes of oscillation respectively.
In one embodiment of this invention, the alternating voltage amplitude of oscillation of the number in above-mentioned multiple common electrode current potential kenel intervals, respective time span and central point of other common electrode current potential or DC potential are pursuant to polarity profile shape dissimilar on display to decide.
In one embodiment of this invention, above-mentioned display be with common electrode current potential unit switching time be one the repetition time unit change its polarity profile shape, and multiple common electrode current potential kenel interval corresponds respectively to various polarity profile shape.
In one embodiment of this invention, the alternating voltage amplitude of oscillation of the number in above-mentioned multiple common electrode current potential kenel intervals, respective time span and central point of other common electrode current potential or DC potential are pursuant to presentation content different on display to decide.
The present invention proposes a kind of circuit of display driving, for driving a display.Circuit of display driving comprises a sequential circuit and has electrode potential generation unit altogether.Sequential circuit instruction electrode potential unit switching time altogether.Common electrode current potential generation unit, with common electrode current potential unit switching time be one the repetition time unit, provide common electrode current potential, to define the voltage reference of display.Wherein, common electrode current potential unit switching time has dissimilar multiple common electrode current potential kenels intervals.The time span in each common electrode current potential kenel interval comprises one or more shot length.In dissimilar common electrode current potential kenel interval, the common electrode current potential be provided has the different alternating voltage amplitudes of oscillation respectively or DC voltage position is accurate.
In one embodiment of this invention, above-mentioned circuit of display driving also comprises electrode potential control module altogether.Common electrode control of Electric potentials unit, according to polarity profile shape dissimilar on display or different presentation content, controls common electrode current potential generation unit and provides the common electrode current potential with the different alternating voltage amplitudes of oscillation or DC voltage position standard.
In one embodiment of this invention, in common electrode current potential unit switching time, the common electrode current potential kenel that dissimilar common electrode current potential kenel interval comprises multiple alternating current type is interval, has the different alternating voltage amplitudes of oscillation respectively in be wherein provided common electrode current potential.
In one embodiment of this invention, in common electrode current potential unit switching time, the common electrode current potential kenel that dissimilar common electrode current potential kenel interval also comprises multiple direct current type is interval, after being arranged in the common electrode current potential kenel interval of multiple alternating current type in proper order, in be wherein provided common electrode current potential, there is different DC voltage positions respectively accurate.
In one embodiment of this invention, in common electrode current potential unit switching time, the common electrode current potential kenel that dissimilar common electrode current potential kenel interval comprises multiple direct current type is interval, has different DC voltage positions respectively accurate in be wherein provided common electrode current potential.
In one embodiment of this invention, in common electrode current potential unit switching time, the common electrode current potential kenel that dissimilar common electrode current potential kenel interval also comprises multiple alternating current type is interval, after being arranged in the common electrode current potential kenel interval of multiple direct current type in proper order, in be wherein provided common electrode current potential, there is the different alternating voltage amplitudes of oscillation respectively.
In one embodiment of this invention, the alternating voltage amplitude of oscillation of the number in above-mentioned multiple common electrode current potential kenel intervals, respective time span and central point of other common electrode current potential or DC potential are pursuant to polarity profile shape dissimilar on display to decide.
In one embodiment of this invention, above-mentioned display be with common electrode current potential unit switching time be one the repetition time unit change its polarity profile shape, and multiple common electrode current potential kenel interval corresponds respectively to various polarity profile shape.
In one embodiment of this invention, the alternating voltage amplitude of oscillation of the number in above-mentioned multiple common electrode current potential kenel intervals, respective time span and central point of other common electrode current potential or DC potential are pursuant to presentation content different on display to decide.
The invention provides a kind of common electrode potential controlling apparatus, for a circuit of display driving, wherein circuit of display driving comprises electrode potential generation unit altogether.Common electrode potential controlling apparatus according to polarity profile shape dissimilar on display or different presentation content, control common electrode current potential generation unit with electrode potential unit switching time be altogether one the repetition time unit, common electrode current potential is provided.Wherein, it is interval that common electrode current potential unit switching time has dissimilar multiple common electrode current potential kenels, and the time span system in each common electrode current potential kenel interval comprises one or more shot length.In dissimilar common electrode current potential kenel interval, the common electrode current potential be provided has the different alternating voltage amplitudes of oscillation respectively or DC voltage position is accurate.
In one embodiment of this invention, above-mentioned common electrode potential controlling apparatus comprises an image judging unit and a logic control element.Image judging unit according on display the image that is shown, judge the type of polarity profile shape or the content of image, to provide a judged result.Logic control element, according to judged result, controls common electrode current potential generation unit and provides the common electrode current potential with the different alternating voltage amplitudes of oscillation or DC voltage position standard.
In one embodiment of this invention, above-mentioned common electrode potential controlling apparatus also comprises a look-up table.Look-up table stores the type of polarity profile shape or the content alternating voltage amplitude of oscillation of electrode potential or the corresponding relation of DC voltage position standard together of image.Logic control element also controls common electrode current potential generation unit according to look-up table and provides the common electrode current potential with the different alternating voltage amplitudes of oscillation or DC voltage position standard.
The invention provides a kind of common electrode driving method, for driving a display.Common electrode driving method comprises the steps.To exchange both kenel or direct current kenel at least one of them common electrode current potential driving display.With altogether electrode potential unit switching time be one the repetition time unit, judge polarity profile shape or the presentation content of current picture on display.According to polarity profile shape or the presentation content of the type of current picture, select both the alternating voltage amplitude of oscillation of adjustment common electrode current potential or DC voltage position standard at least one of them.There is provided common electrode current potential, to define the voltage reference of display.
In one embodiment of this invention, it is interval that above-mentioned common electrode current potential unit switching time has dissimilar multiple common electrode current potential kenels.The time span in each common electrode current potential kenel interval comprises one or more shot length.
In one embodiment of this invention, in dissimilar common electrode current potential kenel interval, the common electrode current potential be provided has the different alternating voltage amplitudes of oscillation respectively or DC voltage position is accurate.
For above-mentioned feature and advantage of the present invention can be become apparent, special embodiment below, and coordinate accompanying drawing to be described in detail below.
Accompanying drawing explanation
Figure 1A and Figure 1B is the block diagram of the display of different embodiments of the invention.
Fig. 2 is the oscillogram of common electrode current potential in common electrode current potential unit switching time of the interchange kenel of one embodiment of the invention.
Fig. 3 is the schematic diagram of the polarity profile shape on the display panel of one embodiment of the invention.
Fig. 4 is the oscillogram of common electrode current potential in common electrode current potential unit switching time of the direct current kenel of one embodiment of the invention.
Fig. 5 is the oscillogram of common electrode current potential in common electrode current potential unit switching time of the alternating current-direct current hybrid state of one embodiment of the invention.
Fig. 6 is the flow chart of steps of the polymorphic type common electrode driving method of one embodiment of the invention.
Fig. 7 is the time diagram during the specific driving of display.
Reference numeral:
100,100 ': display
110: driving circuit
111: drive element of the grid
112: sequential circuit
113: source drive unit
114: common electrode current potential generation unit
116,116 ': common electrode control of Electric potentials unit
118: reference voltage generation unit
120: display panel
132: image judging unit
134: logic control element
136: look-up table
Tu, Tu ', Tu ": common electrode current potential unit switching time
Tvd_1, Tvd_2, Tvd_N, Tvd_ (N+1), Tvd_ (N+2), Tvd_ (N+M), Tvd_1 ', Tvd_2 ', Tvd_N ': common electrode current potential kenel is interval
Vcom, Vcom ', Vcom ": common electrode current potential
Vref: reference voltage
V_1, V_2, V_3, V_4, V_K, V_ (K+1), V_ (K+2), V_ (K+3), V_ (K+M+1), V_ (K+1) V_1 ', V_2 ', V_N ': voltage level
S600, S602, S604, S606: the step of polymorphic type common electrode driving method
Embodiment
Generally speaking, the main type of drive of display panel utilizes common electrode current potential to define the voltage reference of display panels, and its type mainly can be divided into the common electrode current potential exchanging kenel and direct current kenel.In exemplary embodiment of the present invention, the common electrode current potential be provided during driving has the different alternating voltage amplitudes of oscillation respectively or DC voltage position is accurate, eliminates display abnormal, promote display quality in the mode of dynamic modulation common electrode.
Figure 1A is the block diagram of the display of one embodiment of the invention.Please refer to Figure 1A, the display 100 of the present embodiment comprises driving circuit 110 and display panel 120.Driving circuit 110 receiver, video signal of video signal (not shown), and drive display panel 120 to show corresponding presentation content accordingly.In the present embodiment, except drive element of the grid 111 and source drive unit 113, driving circuit 110 comprises a sequential circuit 112, altogether electrode potential generation unit 114, altogether electrode potential control module 116 and a reference voltage generation unit 118.
Display panel 120 comprises a pel array, and completes its display data scanning and the function that writes of data by drive element of the grid 111 and source drive unit 113.Common electrode current potential Vcom is pulled together to produce by common electrode current potential generation unit 114, common electrode control of Electric potentials unit 116 and reference voltage generation unit 118.Common electrode control of Electric potentials unit 116 controls common electrode current potential generation unit 114, produces different common electrode current potential Vcom to make it.Reference voltage generation unit 118 then provides common electrode current potential generation unit 114 to produce one or more reference voltage required in the process of common electrode current potential Vcom.
Under the control of common electrode control of Electric potentials unit 116, common electrode current potential generation unit 114 with altogether electrode potential unit switching time Tu be one the repetition time unit, provide common electrode current potential Vcom to display panel 120, to define its voltage reference.Electrode potential unit switching time Tu is made up of multiple dissimilar multiple common electrode current potential kenel intervals, and in these dissimilar common electrode current potential kenel intervals, this common electrode current potential Vcom be provided has the different alternating voltage amplitudes of oscillation respectively or DC voltage position is accurate.In addition, common electrode current potential unit switching time Tu then can be produced by sequential circuit 112, and is provided to common electrode current potential generation unit 114 and common electrode control of Electric potentials unit 116.
Can need to decide according to various different design from the content in central multiple common electrode current potential kenel intervals in the length of common electrode current potential unit switching time Tu.For example, common electrode control of Electric potentials unit 116 is better can according to polarity profile shape dissimilar on display panel 120 or different presentation content, and correspondingly controlling common electrode current potential generation unit 114 provides the common electrode current potential Vcom with the different alternating voltage amplitudes of oscillation or DC voltage position standard to display panel 120.In other words, according to system operating condition, the kind (time span and content) of common electrode current potential unit switching time can dynamically be changed, to reach the optimization of Dynamic System.
Figure 1A also shows one of the detail structure chart of common electrode control of Electric potentials unit 116 embodiment.In this embodiment, common electrode control of Electric potentials unit 116 comprises image judging unit 132 and a logic control element 134.Image judging unit 132 according on display the image that is shown judge the type of polarity profile shape or the content of image, to provide a judged result.Logic control element 134 is according to this judged result, and controlling common electrode current potential generation unit 114 provides the common electrode current potential Vcom with the different alternating voltage amplitudes of oscillation to display panel 120.Thus, the alternating voltage amplitude of oscillation of the number in common electrode current potential kenel interval, respective time span and central point of other common electrode current potential Vcom just can be pursuant to polarity profile shape dissimilar on display or presentation content decides.
With polarity profile shape dissimilar on display, image judging unit 132 receives a reversion reference signal (not shown), with the polarity inversion mode of display during obtaining each picture.The polarity inversion mode that corresponding display is different, common electrode current potential generation unit 114 can set the alternating voltage amplitude of oscillation of common electrode current potential Vcom via logic control element 134.At this, this reversion reference signal can produce via the previous stage circuit of driving circuit 110 outside, or provided by source electrode driver 113.
On the other hand, with regard to presentation content different on display, image judging unit 132 receives a video image signal (not shown), with the information of presentation content shown by display during obtaining each picture, this information can comprise the presentation content characteristic of the image analytic degree of image frame, image brilliance, image spectrum distribution, colors of image number, image turnover rate or display mode (i.e. 2D image or 3D image) etc.Corresponding different presentation content, common electrode current potential generation unit 114 can set the alternating voltage amplitude of oscillation of common electrode current potential Vcom via logic control element 134.At this, this video image signal can produce via the previous stage circuit of driving circuit 110 outside, or provided by source electrode driver 113.
In sum, the common electrode current potential be provided during driving can have the different alternating voltage amplitudes of oscillation or DC voltage position standard according to application demand (such as being presentation content or polarity profile shape) in different time.As a result, can the mode of dynamic modulation common electrode to eliminate display abnormal, thus promote display quality.
It should be noted that in the embodiment shown in Figure 1A, common electrode control of Electric potentials unit 116 controls common electrode current potential generation unit 114, produces desired common electrode current potential Vcom to make it.In other embodiments, common electrode control of Electric potentials unit 116 can change into and only control reference voltage generation unit 118, or both controlling, produces desired common electrode current potential Vcom to cause common electrode current potential generation unit 114 simultaneously.
In addition, it should be noted that in this embodiment, common electrode current potential unit switching time Tu is produced by sequential circuit 112 and is provided to common electrode current potential generation unit 114 and common electrode control of Electric potentials unit 116.But, in other embodiments, common electrode current potential unit switching time Tu can be produced according to the different circuit needing cause different, and be provided to the one to multiple person in the middle of common electrode current potential generation unit 114, common electrode control of Electric potentials unit 116, reference voltage generation unit 118.For example, in an embodiment, common electrode current potential unit switching time Tu is only provided to common electrode current potential generation unit 114 by sequential circuit 112.In another embodiment, common electrode current potential unit switching time Tu is produced by sequential circuit 112 and is provided to common electrode control of Electric potentials unit 116 (such as being inner image judging unit 132), then by common electrode control of Electric potentials unit 116 (such as being inner logic control element 134) instruction common electrode current potential generation unit common electrode current potential unit switching time Tu.
In addition, it should be noted that in the middle of driving circuit 110, each circuit can be embodied as single integrated circuit (IC) chip, also can separately be embodied as multiple integrated circuit (IC) chip.For example, common electrode current potential generation unit 114, common electrode control of Electric potentials unit 116, reference voltage generation unit 118 may be embodied as the integrated circuit (IC) chip different from drive element of the grid 111, sequential circuit 112, source drive unit 113.
Figure 1B is the block diagram of the display of another embodiment of the present invention.Please refer to Figure 1A and Figure 1B, the display 100 ' of the present embodiment is similar to the display 100 of Figure 1A, and only main between the two difference is such as that the common electrode control of Electric potentials unit 116 ' of the present embodiment also comprises a look-up table 136.Look-up table 136 stores the corresponding relation of the type of polarity profile shape or the presentation content alternating voltage amplitude of oscillation of electrode potential Vcom together, to make logic control element 134 after receiving the judged result that image judging unit 132 provides, also can control common electrode current potential generation unit 114 according to look-up table 136 and the common electrode current potential Vcom with the different alternating voltage amplitudes of oscillation is provided.Other details of operations can be analogized by the related description of Figure 1A and obtain, and in this case seldom explain for simplicity.
Fig. 2 is the oscillogram of common electrode current potential in common electrode current potential unit switching time of the interchange kenel of one embodiment of the invention.Please refer to Figure 1A and Fig. 2, in the present embodiment, common electrode current potential generation unit 114 be with common electrode current potential unit switching time Tu be one the repetition time unit, provide the common electrode current potential Vcom with the different alternating voltage amplitudes of oscillation, to define the voltage reference of display panel 120.
The common electrode current potential unit switching time Tu of the present embodiment comprises the interval Tvd_1 of common electrode current potential kenel of multiple alternating current type, Tvd_2 ..., Tvd_N, has the different alternating voltage amplitudes of oscillation respectively in be wherein provided common electrode current potential Vcom.Further, the time span in each common electrode current potential kenel interval comprises one or more shot length.
For example, the time span of the interval Tvd_1 of common electrode current potential kenel comprises A shot length, in the ac square wave that be wherein provided common electrode current potential Vcom vibrates between voltage level V_1 and V_2.The time span of the interval Tvd_2 of common electrode current potential kenel comprises B shot length, in the ac square wave that be wherein provided common electrode current potential Vcom vibrates between voltage level V_3 and V_4.The time span of the interval Tvd_N of common electrode current potential kenel comprises X shot length, in the ac square wave that be wherein provided common electrode current potential Vcom vibrates between voltage level V_K and V_ (K+1).At this, the alternating voltage amplitude of oscillation such as refers to the difference between difference ... between difference between voltage level V_1 and V_2, voltage level V_3 and V_4 and V_K and V_ (K+1).
Comprehensively above-mentioned, the common electrode current potential Vcom of the present embodiment does in common electrode current potential unit switching time Tu with at least two or more different alternating voltage amplitude of oscillation to switch, and as repetition time unit driving display panel 120, to define its voltage reference.
Fig. 3 is the schematic diagram of the polarity profile shape on the display panel of one embodiment of the invention.Please refer to Figure 1A and Fig. 3, in the present embodiment, display panel 120 carries out cyclic switching at the interval Tvd_1 of common electrode current potential kenel, Tvd_2 ..., Tvd_N between kind of the row reversion of two shown in Fig. 3 and two kinds of single-points are reversed.For example, at the interval Tvd_1 of common electrode current potential kenel, the polarity profile shape on display panel 120 is such as the first row reversal pattern.At the interval Tvd_2 of common electrode current potential kenel, the polarity profile shape on display panel 120 is such as the first single-point reversal pattern.At the interval Tvd_3 of common electrode current potential kenel, the polarity profile shape on display panel 120 is such as the second row reversal pattern.At the interval Tvd_4 of common electrode current potential kenel, the polarity profile shape on display panel 120 is such as the second single-point reversal pattern.As for the interval Tvd_5 of common electrode current potential kenel, Tvd_6 ..., Tvd_N, the switching of the polarity profile shape on display panel 120 is when analogizing according to aforesaid way, and only polarity profile shape of the present invention be not limited to be expert at reversion and single-point reverses between two profiles state and switch.In other embodiments, in the middle of dissimilar on display panel 120 polarity profile shape at least one be the polarity profile shape being selected from following classes: row reversion (Row Inversion), row reversion (Column Inversion), single-point reversion (Single DotInversion), multi-point reverse (Multiple Dot Inversion), multiple spot add multi-point reverse (M+N DotInversion) and picture frame reversion (Frame Inversion).
Corresponding to the polarity profile shape shown in Fig. 3, display 100 be with common electrode current potential unit switching time Tu be one the repetition time unit change its polarity profile shape, wherein first common electrode current potential unit switching time Tu is made up of the interval Tvd_1 of common electrode current potential kenel, Tvd_2 ..., Tvd_4, corresponds respectively to the polarity profile shape of above-mentioned Four types; Second common electrode current potential unit switching time Tu is made up of the interval Tvd_5 of common electrode current potential kenel, Tvd_6 ..., Tvd_8, corresponds respectively to the polarity profile shape of above-mentioned Four types; The rest may be inferred.
In the above-described embodiments, common electrode current potential generation unit 114 is to provide the common electrode current potential Vcom with the different alternating voltage amplitudes of oscillation in common electrode current potential unit switching time Tu.In another embodiment, common electrode current potential generation unit 114 also can provide the common electrode current potential Vcom with different DC voltage position standards to define the voltage reference of display panel 120.
Fig. 4 is the oscillogram of common electrode current potential in common electrode current potential unit switching time of the direct current kenel of one embodiment of the invention.In the present embodiment, in the interval Tvd_1 ' of dissimilar common electrode current potential kenel, Tvd_2 ' ..., Tvd_N ', the common electrode current potential Vcom ' be provided, there is different DC voltage position standards respectively.
Specifically, the common electrode current potential unit switching time Tu ' of the present embodiment comprises the interval Tvd_1 ' of common electrode current potential kenel of multiple direct current type, Tvd_2 ' ..., Tvd_N ', has different DC voltage positions respectively accurate in be wherein provided common electrode current potential Vcom '.Further, the time span in each common electrode current potential kenel interval comprises one or more shot length.
For example, the time span of the interval Tvd_1 ' of common electrode current potential kenel comprises C shot length, be a standard is the DC voltage of V_1 ' in be wherein provided common electrode current potential Vcom '.The time span of the interval Tvd_2 ' of common electrode current potential kenel comprises D shot length, be a standard is the DC voltage of V_2 ' in be wherein provided common electrode current potential Vcom '.The time span of the interval Tvd_N of common electrode current potential kenel comprises Y shot length, be a standard is the DC voltage of V_N ' in be wherein provided common electrode current potential Vcom '.
Therefore, the common electrode current potential Vcom ' of the present embodiment does in common electrode current potential unit switching time with more than at least three kinds different DC voltage position standards to switch, and as one the repetition time unit drive display panel 120, to define its voltage reference.
Only it should be noted, in the present embodiment, the DC voltage position standard of the number in common electrode current potential kenel interval, respective time span and central point of other common electrode current potential Vcom ' is pursuant to polarity profile shape dissimilar on display or presentation content decides, its deciding means is similar to the embodiment (i.e. the embodiment of Fig. 2) that common electrode current potential is alternating voltage, just repeats no more at this.
Fig. 5 is the oscillogram of common electrode current potential in common electrode current potential unit switching time of the alternating current-direct current hybrid state of one embodiment of the invention.In the present embodiment, in the interval Tvd_1 of dissimilar common electrode current potential kenel, Tvd_2 ..., Tvd_ (N+M), the common electrode current potential Vcom ' be provided, there is the different alternating voltage amplitudes of oscillation or DC voltage position standard respectively.
Specifically, the common electrode current potential unit switching time Tu of the present embodiment " comprise the interval Tvd_1 of common electrode current potential kenel of multiple alternating current type, Tvd_2 ..., the interval Tvd_ (N+1) of common electrode current potential kenel of Tvd_N and multiple alternating current type, Tvd_ (N+2) ..., Tvd_ (N+M).At the interval Tvd_1 of common electrode current potential kenel, Tvd_2 ..., Tvd_N, the common electrode current potential Vcom be provided " there is the different alternating voltage amplitudes of oscillation respectively.At the interval Tvd_ (N+1) of common electrode current potential kenel, Tvd_ (N+2) ..., Tvd_ (N+M), the common electrode current potential Vcom be provided " there is different DC voltage position standards respectively.
In the present embodiment, after the interval Tvd_ (N+1) of the common electrode current potential kenel of direct current type, Tvd_ (N+2) ..., Tvd_ (N+M) are arranged in the interval Tvd_1 of common electrode current potential kenel of alternating current type, Tvd_2 ..., Tvd_N in proper order, but the present invention is not limited thereto.In another embodiment, after the common electrode current potential kenel interval of alternating current type also can be arranged at the common electrode current potential kenel interval of direct current type sequentially.
Therefore, the common electrode current potential Vcom of the present embodiment " be accurate at common electrode current potential unit switching time Tu with at least two or more different alternating voltage amplitude of oscillation DC voltage position different from more than at least three kinds " in do and switch, and as repetition time unit driving display panel 120, to define its voltage reference.
Only it should be noted, in the present embodiment, the number in common electrode current potential kenel interval, respective time span and central point of other common electrode current potential Vcom " the alternating voltage amplitude of oscillation and DC voltage position standard be pursuant to polarity profile shape dissimilar on display or presentation content decides; its deciding means is similar to the embodiment (i.e. the embodiment of Fig. 2) that common electrode current potential is alternating voltage, or common electrode current potential is that the embodiment (i.e. the embodiment of Fig. 4) of DC voltage just repeats no more at this.
Fig. 6 is the flow chart of steps of the polymorphic type common electrode driving method of one embodiment of the invention.Please refer to Figure 1A and Fig. 6, the polymorphic type common electrode driving method of the present embodiment is such as driving the display of Figure 1A or Figure 1B.For the common electrode current potential of the alternating current-direct current hybrid state of the display 100 of Figure 1A and Fig. 5.Polymorphic type common electrode driving method comprises the steps.First, in step S600, with common electrode current potential Vcom " driving display 100.Wherein, the common electrode current potential Vcom of the present embodiment " at common electrode current potential unit switching time Tu " in have the different alternating voltage amplitudes of oscillation and DC voltage position accurate.In other embodiments, common electrode current potential is at common electrode current potential unit switching time Tu " in only can to have the different alternating voltage amplitudes of oscillation or DC voltage position accurate.Then, in step S602, polarity profile shape or the presentation content of current picture on display 100 is judged.Afterwards, in step s 604, according to judged polarity profile shape or presentation content, adjust, select adjustment common electrode current potential Vcom " the alternating voltage amplitude of oscillation or DC voltage position standard both at least one of them.Then, in step S606, common electrode current potential Vcom is provided " to display panel 120, to define the voltage reference of display 100.
Fig. 7 is the time diagram during the specific driving of display.During this specifically drives, common electrode current potential generation unit 114 with common electrode current potential unit switching time be one the repetition time unit, provide common electrode current potential Vcom to define the voltage reference of display panel 120.Please refer to Figure 1A-1B, Fig. 6 and Fig. 7, in the present embodiment, after having carried out step S606, polymorphic type common electrode driving method can get back to step S602, to continue the polarity profile shape or the presentation content that judge current picture on display 100.Therefore, in during this specifically drives, common electrode control of Electric potentials unit 116 is control common electrode current potential generation unit 114 according to polarity profile shape dissimilar on display 100 or different presentation content, with make common electrode current potential generation unit 114 with common electrode current potential unit switching time be one the repetition time unit, common electrode current potential Vcom is provided " to display panel 120; to define the voltage reference of display 100, as shown in Figure 7.
In the present embodiment, the repetition time, unit was such as the common electrode current potential unit switching time Tu ' of the common electrode current potential unit switching time Tu of Fig. 2, Fig. 4, or the common electrode current potential unit switching time Tu of Fig. 5 ".In addition, the polymorphic type common electrode driving method of embodiments of the invention can obtain enough teachings, suggestion and implementation by the describing of Figure 1A to Fig. 5 embodiment, and therefore repeats no more.
In sum, in exemplary embodiment of the present invention, the common electrode current potential that common electrode current potential generation unit provides during driving has the different alternating voltage amplitudes of oscillation respectively or DC voltage position is accurate, the display eliminating display in the mode of dynamic modulation common electrode current potential is abnormal, to promote its display quality.
Although the present invention with embodiment disclose as above, so itself and be not used to limit the present invention, any person of an ordinary skill in the technical field, when doing a little change and retouching, and does not depart from the spirit and scope of the present invention.
Claims (23)
1. a common electrode driving method, for driving a display, the method comprises:
With altogether electrode potential unit switching time be one the repetition time unit, common electrode current potential is provided, to define the voltage reference of this display,
Wherein this common electrode current potential unit switching time has dissimilar multiple common electrode current potential kenels intervals, and the time span in each this common electrode current potential kenel interval comprises one or more shot length,
Wherein in these dissimilar common electrode current potential kenel intervals, this common electrode current potential be provided has the different alternating voltage amplitudes of oscillation respectively and DC voltage position is accurate.
2. common electrode driving method according to claim 1, wherein in this common electrode current potential unit switching time, these dissimilar common electrode current potential kenel intervals comprise:
The common electrode current potential kenel of multiple alternating current type is interval, has the different alternating voltage amplitudes of oscillation respectively in this be wherein provided common electrode current potential.
3. common electrode driving method according to claim 2, wherein in this common electrode current potential unit switching time, these dissimilar common electrode current potential kenel intervals also comprise:
The common electrode current potential kenel of multiple direct current type is interval, after being arranged in the common electrode current potential kenel interval of the plurality of alternating current type in proper order, has different DC voltage positions respectively accurate in this be wherein provided common electrode current potential.
4. common electrode driving method according to claim 1, wherein in this common electrode current potential unit switching time, these dissimilar common electrode current potential kenel intervals comprise:
The common electrode current potential kenel of multiple direct current type is interval, has different DC voltage positions respectively accurate in this be wherein provided common electrode current potential.
5. common electrode driving method according to claim 4, wherein in this common electrode current potential unit switching time, these dissimilar common electrode current potential kenel intervals also comprise:
The common electrode current potential kenel of multiple alternating current type is interval, after being arranged in the common electrode current potential kenel interval of the plurality of direct current type in proper order, has the different alternating voltage amplitudes of oscillation respectively in this be wherein provided common electrode current potential.
6. common electrode driving method according to claim 1, wherein this alternating voltage amplitude of oscillation of the number in the plurality of common electrode current potential kenel interval, respective time span and central point of other this common electrode current potential or this DC voltage position standard are pursuant to polarity profile shape dissimilar on this display to decide.
7. common electrode driving method according to claim 6, wherein this display be with this common electrode current potential unit switching time be one the repetition time unit change its polarity profile shape, and the plurality of common electrode current potential kenel interval corresponds respectively to various polarity profile shape.
8. common electrode driving method according to claim 1, wherein this alternating voltage amplitude of oscillation of the number in the plurality of common electrode current potential kenel interval, respective time span and central point of other this common electrode current potential or this DC voltage position standard are pursuant to presentation content different on this display to decide.
9. a circuit of display driving, for driving a display, this driving circuit comprises:
One sequential circuit, instruction is electrode potential unit switching time altogether; And
Altogether electrode potential generation unit, with this common electrode current potential unit switching time be one the repetition time unit, common electrode current potential is provided, to define the voltage reference of this display,
Wherein this common electrode current potential unit switching time has dissimilar multiple common electrode current potential kenels intervals, and the time span in each this common electrode current potential kenel interval comprises one or more shot length,
Wherein in these dissimilar common electrode current potential kenel intervals, this common electrode current potential be provided has the different alternating voltage amplitudes of oscillation respectively and DC voltage position is accurate.
10. circuit of display driving according to claim 9, also comprises:
Electrode potential control module, according to polarity profile shape dissimilar on this display or different presentation content, controls this common electrode current potential generation unit and provides this common electrode current potential with the different alternating voltage amplitudes of oscillation or DC voltage position standard altogether.
11. circuit of display driving according to claim 9, wherein in this common electrode current potential unit switching time, these dissimilar common electrode current potential kenel intervals comprise:
The common electrode current potential kenel of multiple alternating current type is interval, has the different alternating voltage amplitudes of oscillation respectively in this be wherein provided common electrode current potential.
12. circuit of display driving according to claim 11, wherein in this common electrode current potential unit switching time, these dissimilar common electrode current potential kenel intervals also comprise:
The common electrode current potential kenel of multiple direct current type is interval, after being arranged in the common electrode current potential kenel interval of the plurality of alternating current type in proper order, has different DC voltage positions respectively accurate in this be wherein provided common electrode current potential.
13. circuit of display driving according to claim 9, wherein in this common electrode current potential unit switching time, these dissimilar common electrode current potential kenel intervals comprise:
The common electrode current potential kenel of multiple direct current type is interval, has different DC voltage positions respectively accurate in this be wherein provided common electrode current potential.
14. circuit of display driving according to claim 13, wherein in this common electrode current potential unit switching time, these dissimilar common electrode current potential kenel intervals also comprise:
The common electrode current potential kenel of multiple alternating current type is interval, after being arranged in the common electrode current potential kenel interval of the plurality of direct current type in proper order, has the different alternating voltage amplitudes of oscillation respectively in this be wherein provided common electrode current potential.
15. circuit of display driving according to claim 9, wherein this alternating voltage amplitude of oscillation of the number in the plurality of common electrode current potential kenel interval, respective time span and central point of other this common electrode current potential or this DC voltage position standard are pursuant to polarity profile shape dissimilar on this display to decide.
16. circuit of display driving according to claim 15, wherein this display be with this common electrode current potential unit switching time be one the repetition time unit change its polarity profile shape, and the plurality of common electrode current potential kenel interval corresponds respectively to various polarity profile shape.
17. circuit of display driving according to claim 9, wherein this alternating voltage amplitude of oscillation of the number in the plurality of common electrode current potential kenel interval, respective time span and central point of other this common electrode current potential or this DC voltage position standard are pursuant to presentation content different on this display to decide.
18. 1 kinds of common electrode potential controlling apparatus, for a circuit of display driving, wherein this driving circuit comprises electrode potential generation unit altogether,
This common electrode potential controlling apparatus according to polarity profile shape dissimilar on this display or different presentation content, control this common electrode current potential generation unit with altogether electrode potential unit switching time be one the repetition time unit, common electrode current potential is provided,
Wherein this common electrode current potential unit switching time has dissimilar multiple common electrode current potential kenels intervals, and the time span in each this common electrode current potential kenel interval comprises one or more shot length,
Wherein in these dissimilar common electrode current potential kenel intervals, this common electrode current potential be provided has the different alternating voltage amplitudes of oscillation respectively and DC voltage position is accurate.
19. common electrode potential controlling apparatus according to claim 18 comprise:
One image judging unit, according on this display the image that is shown, judge the type of this isopolarity profile shape or the content of these images, to provide a judged result; And
One logic control element, according to this judged result, controls this common electrode current potential generation unit and provides this common electrode current potential with the different alternating voltage amplitudes of oscillation and DC voltage position standard.
20. common electrode potential controlling apparatus according to claim 19, also comprise:
One look-up table, stores the alternating voltage amplitude of oscillation of the type of this isopolarity profile shape or the content of these images and this common electrode current potential or the corresponding relation of DC voltage position standard,
Wherein this logic control element is also according to this look-up table, controls this common electrode current potential generation unit and provides this common electrode current potential with the different alternating voltage amplitudes of oscillation and DC voltage position standard.
21. 1 kinds of common electrode driving methods, for driving a display, the method comprises:
This display is driven with the common electrode current potential exchanging kenel and direct current kenel;
With altogether electrode potential unit switching time be one the repetition time unit, judge polarity profile shape or the presentation content of current picture on this display;
According to polarity profile shape or the presentation content of the type of this current picture, select both the alternating voltage amplitude of oscillation of adjustment common electrode current potential or DC voltage position standard at least one of them; And
There is provided this common electrode current potential, to define the voltage reference of this display.
22. common electrode driving methods according to claim 21, wherein this common electrode current potential unit switching time has dissimilar multiple common electrode current potential kenels intervals, and the time span in each this common electrode current potential kenel interval comprises one or more shot length.
23. electrode driving methods according to claim 21, wherein in these dissimilar common electrode current potential kenel intervals, this common electrode current potential be provided has the different alternating voltage amplitudes of oscillation respectively or DC voltage position is accurate.
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| CN106448601B (en) * | 2016-11-03 | 2022-12-02 | 昆山龙腾光电股份有限公司 | Liquid crystal display device and common voltage driving method thereof in narrow viewing angle mode |
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