CN104036735A - Display driving apparatus, and driving method of display panel - Google Patents
Display driving apparatus, and driving method of display panel Download PDFInfo
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- CN104036735A CN104036735A CN201310068702.9A CN201310068702A CN104036735A CN 104036735 A CN104036735 A CN 104036735A CN 201310068702 A CN201310068702 A CN 201310068702A CN 104036735 A CN104036735 A CN 104036735A
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Abstract
The invention provides a display driving apparatus, and a driving method of a display panel, for driving a display panel. The display driving apparatus comprises multiple source drivers. The source drivers are used for outputting video image data for driving the display panel. Each source driver comprises multiple driving channels. Each source driver randomly unlatch at least one of the driving channels included by itself through a control signal so as to enable the driving channel to output the video image data. In each source driver, at least a part of the driving channels are randomly unlatched at different sequences to output the video image data.
Description
Technical field
The invention relates to the driving method of a kind of display drive apparatus and display panel, and relate to especially a kind of drive unit of liquid crystal display and the driving method of display panels.
Background technology
Generally speaking,, in order to drive the source electrode driver of display panel to generally include multiple driving passages, each driving passage comprises latch, digital analogue converter, output buffer and output switch.The timing control signal that Digital Image Data on data bus provides according to time schedule controller, the driving passage of input source driver.Source electrode driver utilizes digital analogue converter to use converting digital view data becomes analogy driving signal, and transmission analogy drives signal to output buffer.Output buffer further strengthens analogy and drives signal, and transmits analogy driving signal to display panel by the output switch of conducting, makes view data be sent to display panel.But; the driving passage of existing display drive apparatus; its output switch can be switched at specific time point conventionally simultaneously; now all output buffers can be in this specific time point output class ratio driving signal simultaneously; its result will make display panel and drive unit thereof easily be subject to electromagnetic interference (EMI) (electromagnetic interference is called for short EMI).
Summary of the invention
The invention provides the driving method of a kind of display drive apparatus and display panel.
The invention provides a kind of display drive apparatus, can reduce electromagnetic interference (EMI).
The invention provides a kind of driving method of display panel, can reduce electromagnetic interference (EMI).
The invention provides a kind of display drive apparatus, in order to drive a display panel.Display drive apparatus comprises multiple source electrode drivers.Source electrode driver drives display panel in order to export a vedio data.Each source electrode driver comprises multiple source electrode drivers.Each source electrode driver is by a control signal, open at random included driving passage at least one of them, drive passage output video image data to allow.In each source electrode driver, drive at least partly passage to be unlocked at random in different sequential, with output video image data.
In an embodiment of the present invention, above-mentioned display drive apparatus also comprises time schedule controller.Time schedule controller is coupled to source electrode driver.Time schedule controller comprises a mess code generator.Mess code generator for generating one mess code signal is to each source electrode driver.Each source electrode driver is according to mess code signal, open at random included driving passage at least one of them.
In an embodiment of the present invention, above-mentioned each source electrode driver also comprises a random delay generator.Random delay generator is in order to according to mess code signal, and the phase place of random delay control signal, drives passage to be unlocked at random in different sequential to control.
In an embodiment of the present invention, the phase place that control signal is adjusted in above-mentioned each source electrode driver utilization is controlled and is driven passage to be unlocked at random in different sequential.
In an embodiment of the present invention, above-mentioned each driving passage comprises an output buffer and an output switch.Output buffer has first input end, the second input end and output terminal.First input end receiver, video view data.The second input end is coupled to output terminal.Output switch has first end, the second end and control end.First end is coupled to output terminal, and the second end is coupled to display panel, and control end is controlled by control signal.Each source electrode driver is controlled the conducting state of output switch by control signal, to open or to close driving passage.
In an embodiment of the present invention, when each source electrode driver by control signal random open included driving passage at least one of them time, in described source electrode driver, simultaneously the driving passage of reception control signal is to be controlled by the control signal of same phase and to be unlocked.
In an embodiment of the present invention, when each source electrode driver by control signal random open included driving passage at least one of them time, in described source electrode driver, simultaneously the driving passage of reception control signal is to be controlled by the control signal of out of phase and to be unlocked.
In an embodiment of the present invention, in each source electrode driver, the driving passage being unlocked is at random the control signal that is controlled by same phase.
In an embodiment of the present invention, in described source electrode driver, the driving passage being initially unlocked is the control signal that is controlled by out of phase.
In an embodiment of the present invention, in described source electrode driver, the driving passage being initially unlocked is the control signal that is controlled by same phase.
The invention provides a kind of driving method of display panel, be suitable for a display drive apparatus.Display drive apparatus comprises multiple source electrode drivers.The multiple driving passages of each source electrode driver.Described driving method comprises the steps.Receive a vedio data.By a control signal, open at random the included driving passage of each source electrode driver at least one of them.Via at least one of them the driving passage being unlocked at random in each source electrode driver, output video image data, drive display panel.In each source electrode driver, drive at least partly passage to be unlocked at random in different sequential, with output video image data.
In an embodiment of the present invention, above-mentioned driving method also comprises the steps.Produce a mess code signal to each source electrode driver.According to mess code signal random open the included driving passage of each source electrode driver at least one of them.
In an embodiment of the present invention, the included driving passage of the each source electrode driver of above-mentioned random unlatching at least one of them step comprise the steps.According to the phase place of mess code signal random delay control signal, drive passage to be unlocked at random in different sequential to control.
In an embodiment of the present invention, the included driving passage of the each source electrode driver of above-mentioned random unlatching at least one of them step comprise the steps.The phase place of utilization adjustment control signal is controlled the included driving passage of each source electrode driver and is unlocked at random in different sequential.
In an embodiment of the present invention, when by control signal random open the included driving passage of each source electrode driver at least one of them time, in described source electrode driver, simultaneously the driving passage of reception control signal is to be controlled by the control signal of same phase and to be unlocked.
In an embodiment of the present invention, when by control signal random open the included driving passage of each source electrode driver at least one of them time, in described source electrode driver, simultaneously the driving passage of reception control signal is to be controlled by the control signal of out of phase and to be unlocked.
In an embodiment of the present invention, in each source electrode driver, the driving passage being unlocked is at random the control signal that is controlled by same phase.
In an embodiment of the present invention, in described source electrode driver, the driving passage being initially unlocked is the control signal that is controlled by out of phase.
In an embodiment of the present invention, in described source electrode driver, the driving passage being initially unlocked is the control signal that is controlled by same phase.
Based on above-mentioned, in exemplary embodiment of the present invention, the driving passage of each source electrode driver is unlocked at random in different sequential, with output video image data, thereby reduces electromagnetic interference (EMI).
For the 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.
Brief description of the drawings
Fig. 1 illustrates the display drive apparatus schematic diagram of one embodiment of the invention;
Fig. 2 illustrates that Fig. 1 source electrode driver comprises the schematic diagram of multiple driving passages;
Fig. 3 illustrates the output waveform of Fig. 2 output buffer and the signal waveform schematic diagram of control signal;
Fig. 4 illustrates that the random unlatching of one embodiment of the invention drives the schematic diagram of passage;
Fig. 5 to Fig. 9 illustrates that the random unlatching of other embodiments of the invention drives the schematic diagram of passage;
Figure 10 illustrates the flow chart of steps of the driving method of the display panel of one embodiment of the invention.
Description of reference numerals:
100: display drive apparatus;
110: time schedule controller;
112: mess code generator;
120_1 to 120_M: source electrode driver;
121_1 to 121_N: drive passage;
122_1 to 122_M: random delay generator;
200: display panel;
310: output buffer;
320: output switch;
421_1 to 421_4: drive passage;
620_1 to 620_4: output switch;
Δ T1, Δ T2, Δ T3: phase delay time;
T, t1, t2, t3, t4: time point;
Srand: mess code signal;
Sdata: vedio data;
Sctrl, S1, S2, S3, S4: control signal;
S100, S110, S120: the step of the driving method of display panel.
Embodiment
Fig. 1 illustrates the display drive apparatus schematic diagram of one embodiment of the invention.Please refer to Fig. 1, the present embodiment display drive apparatus 100 is in order to drive display panel 200 according to vedio data Sdata.In the present embodiment, display drive apparatus 100 comprises time schedule controller 110 and multiple source electrode driver 120_1 to 120_M.Time schedule controller 110 is in order to provide timing control signal (not shown) and vedio data Sdata to source electrode driver 120_1 to 120_M, with allow source electrode driver 120_1 to 120_M in due course order output video image data Sdata drive display panel 200.
Particularly, Fig. 2 illustrates that Fig. 1 source electrode driver comprises the schematic diagram of multiple driving passages.Please refer to Fig. 2, the present embodiment source electrode driver 120_1 to 120_M for example comprises respectively driving passage 121_1 to 121_N.Generally speaking, the driving passage of source electrode driver generally includes latch, digital analogue converter, output buffer and output switch.For the purpose of brief description, Fig. 2 only illustrates and is positioned at the output buffer and the output switch that drive passage output stage herein.To drive passage 121_1 as example, the present embodiment drives passage 121_1 to comprise output buffer 310 and output switch 320.The analogy that the digital analogue converter (not shown) of first input end (+) the reception previous stage of output buffer 310 provides drives signal, and it is via digital analogue converter converting video view data Sdata gained that this analogy drives signal.The second input end (-) of output buffer 310 is coupled to its output terminal, forms the configuration of voltage follower device (voltage follower), and only this configuration is only in order to illustrate, and the present invention is not limited.Output buffer 310 drives signal in order to strengthen the analogy receiving, and transmits analogy driving signal to display panel 200, to allow display panel 200 show the display frame corresponding to vedio data Sdata by the output switch 320 of conducting.Then, the first end of output switch 320 is coupled to the output terminal of output buffer 310, and the second end of output switch 320 is coupled to pixel column (column) corresponding in display panel 200.The control end of output switch 320 is controlled by control signal Sctrl.The output switch 320 of conducting can transmit analogy and drive signal to its pixel column coupling.In this example, each source electrode driver is controlled the conducting state of output switch by control signal Sctrl, to open or to close the included driving passage of each source electrode driver self.
Fig. 3 illustrates the output waveform of Fig. 2 output buffer and the signal waveform schematic diagram of control signal.Please refer to Fig. 3, the present embodiment control signal Sctrl is for example a square-wave pulse, and output buffer 310 conventionally can be in time point t1 output class than driving signal, and its output waveform as shown in Figure 3.Generally speaking, under the more and more fast application of operating frequency, if the type of drive of display drive apparatus 100 is not adjusted thereupon, the driving passage of each source electrode driver is likely switched on simultaneously, all output buffers can be at specific time point t, output class is than driving signal simultaneously, and its result will make display panel 200 and display drive apparatus 100 itself be subject to serious electromagnetic interference (EMI).Therefore, in the present embodiment, source electrode driver 120_1 to 120_M is by control signal Sctrl, opens at random its one or more in included driving passage 121_1 to 121_N separately, to allow the driving passage output class being unlocked than driving signal.Therefore,, in each source electrode driver, at least part of driving passage is unlocked at random in different sequential, can reduce electromagnetic interference (EMI).
How the each source electrode driver of beneath explanation utilizes control signal to open at random its inner included driving passage.
Fig. 4 illustrates that the random unlatching of one embodiment of the invention drives the schematic diagram of passage.Please refer to Fig. 4, the present embodiment is opened the method that drives passage at random, for example, be to utilize the phase place of adjusting control signal Sctrl, with the driving passage at the each source electrode driver of the random unlatching of different sequential.In this example, drive passage 421_1 to 421_4 as example taking 4 of source electrode driver 120_1, the phase place of control signal Sctrl for example comprises that 4 respectively in order to control the control signal S1 to S4 of output switch 620_1 to 620_4 after adjusting.In the present embodiment, output switch 620_1 to 620_4 is unlocked at the negative edge (falling edge) of control signal S1 to S4 respectively, as the arrow place sign person of each control signal waveform in Fig. 4.
In the present embodiment, the decline sequential of control signal S1 to S4 sequentially postpones (delay) respectively phase delay time Δ T1, Δ T2, Δ T3.That is to say, control signal S2 is compared to control signal S1, phase delay Δ T1, control signal S3 is compared to control signal S2, phase delay Δ T2, control signal S4 is compared to control signal S3, phase delay Δ T3.The operational example of this phase delay is as carried out by the random delay generator 122_1 of source electrode driver 120_1 inside.It should be noted, the time span of the present embodiment phase delay time Δ T1, Δ T2, Δ T3 can equate or be unequal.Therefore, different driving passage 421_1,421_2,421_3,421_4 drive signal at the random output class ratio of different time point t1, t2, t3, t4 over time, stagger the by this output timing of each driving passage, drives the passage electromagnetic interference (EMI) that output signal causes simultaneously thereby reduce.
In addition, in the present embodiment, opening although random and driving the method for passage is to utilize the mode of phase modulation, sequentially according to phase delay time Δ T1, Δ T2, Δ T3, control signal S1 to S4 is tuned as and has 4 kinds of phase places, and the present invention is not limited to this.In another embodiment, the phase delay relation between control signal S1 to S4 also can have other different random aspects.
Fig. 5 illustrates that the random unlatching of another embodiment of the present invention drives the schematic diagram of passage.Please refer to Fig. 5, the present embodiment is opened the method that drives passage at random, is equally to utilize the phase place of adjusting control signal Sctrl, with the driving passage at the each source electrode driver of the random unlatching of different sequential.Drive passage 421_1 to 421_4 as example taking in Fig. 44 again, the decline sequential random delay of the control signal S1 to S4 of Fig. 5 phase delay time Δ T1, Δ T2, Δ T3.That is to say, control signal S4 is compared to control signal S2, phase delay Δ T1, control signal S1 is compared to control signal S4, phase delay Δ T2, control signal S3 is compared to control signal S1, phase delay Δ T3.With regard to the phase delay relation of control signal entirety, the driving passage 421_1 of this example, 421_2,421_3,421_4 drive signal at the random output class ratio of different time point t3, t1, t4, t2 over time, stagger the by this output timing of each driving passage, thus electromagnetic interference (EMI) reduced.
In addition, in Fig. 4 and Fig. 5 embodiment, although opening random and driving the method for passage is to utilize the mode of phase modulation, according to phase delay time Δ T1, Δ T2, Δ T3, control signal S1 to S4 is tuned as and has 4 kinds of phase places at random, but the number of phases of above-described embodiment institute modulation is not in order to limit the present invention.In other embodiments, utilize multiple identical or different phase delay times control signal can be tuned as to have N different phase place, the delay between its phase place and phase place can be equidistantly or is not equidistant, and wherein N is greater than 1 positive integer.Therefore, utilizing the mode of phase modulation, can modulation control signal be to have the out of phase of N, makes the shared frequency content of each phase place become N/mono-, reaches the effect that reduces electromagnetic interference (EMI).It should be noted, in the present invention, the number of phases of institute's modulation can be greater than, be equal to or less than the driving number of channels of each source electrode driver.In addition, by the mode of this kind of phase modulation, utilize original control signal to reach and drive the passage effect of output signal that staggers, therefore can save signal lead area.
Refer again to Fig. 1.In Fig. 4 and Fig. 5 embodiment, the operational example of phase delay is as carried out by the random delay generator 122_1 to 122_M of source electrode driver 120_1 to 120_M inside.Random delay generator 122_1 to 122_M is in order to according to mess code signal Srand, and the phase place of random delay control signal Sctrl, is unlocked in different sequential at random to control included driving passage.In the present embodiment, time schedule controller 110 comprises mess code generator 112.Mess code generator 112 is in order to produce mess code signal Srand to each source electrode driver.Source electrode driver 120_1 to 120_M is again according to mess code signal Srand, open at random included driving passage at least one of them.
Furthermore, Fig. 6 illustrates that the random unlatching of one embodiment of the invention drives the schematic diagram of passage.Please refer to Fig. 6, the present embodiment random delay generator 122_1 to 122_M is according to mess code signal Srand, the phase place of random delay control signal Sctrl.In Fig. 6, on the signaling path of mess code signal Srand, the symbol that indicates " 1 → 3 →--->X → 1 " represents the mess code generator 112 Arbitrary Digit sequence that produces, be sequentially 1,3 ..., X, 1, and the mess code signal Srand that comprises this sequence information is transferred into source electrode driver 120_1 to 120_M, and wherein X is positive integer.Then, source electrode driver 120_1 to 120_M, after receiving this Arbitrary Digit sequence, then is carried out respectively the phase place of random delay control signal Sctrl according to the Arbitrary Digit sequence of mess code signal Srand by inner random delay generator 122_1 to 122_M.
In the present embodiment, when each source electrode driver by control signal random open included driving passage at least one of them time, in described source electrode driver, simultaneously the driving passage of reception control signal Sctrl is to be controlled by the control signal of same phase and to be unlocked.For example, in the time of initial sequential, the received Arbitrary Digit of source electrode driver 120_1 to 120_M is identical, is all 1.Now, the signal waveform of the control signal S1 that each source electrode driver 120_1 to 120_M goes out as shown in Figure 4 to the phase delay situation of its control signal Sctrl, the phase place of control signal Sctrl does not produce delay hereat.Therefore,, in this initial sequential, the driving passage of reception control signal Sctrl is to be controlled by phase place do not produce the control signal Sctrl of delay and be unlocked simultaneously.
Then,, in the next sequential of initial sequential, the received Arbitrary Digit of source electrode driver 120_1 to 120_M is also identical, is all 3.Now, the signal waveform of the control signal S3 that each source electrode driver 120_1 to 120_M goes out as shown in Figure 4 to the phase delay situation of its control signal Sctrl, the phase place of control signal Sctrl has been delayed two phase delay times hereat.In order, the driving passage of reception control signal Sctrl is to be controlled by phase place be delayed the control signal Sctrl of two phase delay times and be unlocked simultaneously at this moment.Along with the carrying out of time, the control signal Sctrl of other sequential phase delay situation can the rest may be inferred, do not repeat them here.Therefore, in the present embodiment, the Serial No. indicating on each source electrode driver represents the phase delay situation of the control signal Sctrl of each source electrode driver.
Therefore, observe in the lump all source electrode drivers, in the present embodiment, simultaneously the driving passage of reception control signal Sctrl is to be controlled by the control signal of same phase and to be unlocked.From another viewpoint, with regard to single source electrode driver, each source electrode driver, along with the carrying out of time, can be tuned as control signal Sctrl to have different phase places.
Fig. 7 illustrates that the random unlatching of another embodiment of the present invention drives the schematic diagram of passage.Please refer to Fig. 7, the present embodiment random delay generator 122_1 to 122_M is equally according to mess code signal Srand, the phase place of random delay control signal Sctrl.In Fig. 7, the mess code signal Srand that is passed to source electrode driver 120_1 to 120_M also comprises the information of Arbitrary Digit sequence " 1 → 3 →--->X → 1 ".
Be with the embodiment difference of Fig. 6, in the present embodiment, when each source electrode driver by control signal random open included driving passage at least one of them time, in described source electrode driver, simultaneously the driving passage of reception control signal Sctrl is to be controlled by the control signal of out of phase and to be unlocked.And in each source electrode driver, the driving passage being unlocked is at random the control signal that is controlled by same phase.
For example, when a sequential in office, the received Arbitrary Digit of the present embodiment source electrode driver 120_1 to 120_M is neither identical, be sequentially respectively 1,3 ..., X.Therefore, the signal waveform of the control signal S1 that source electrode driver 120_1 goes out as shown in Figure 4 to the phase delay situation of its control signal Sctrl, the signal waveform of the control signal S3 that source electrode driver 120_2 goes out as shown in Figure 4 to the phase delay situation of its control signal Sctrl.The control signal Sctrl of all the other source electrode drivers phase delay situation can the rest may be inferred, do not repeat them here.Therefore, in the present embodiment, the driving passage that the driving passage that in source electrode driver 120_2, controlled signal Sctrl opens is opened compared to controlled signal Sctrl in source electrode driver 120_1 can postpone two phase delay times just output classes than driving signals.The driving passage that the driving passage that in source electrode driver 120_M, controlled signal Sctrl opens is opened compared to controlled signal Sctrl in source electrode driver 120_1 can postpone X-1 phase delay time just output class than driving signal.The control signal Sctrl of all the other source electrode drivers phase delay situation can the rest may be inferred, do not repeat them here.
Therefore, observe in the lump all source electrode drivers, in the present embodiment, the driving passage of reception control signal Sctrl is the control signal that is controlled by out of phase simultaneously.From another viewpoint, with regard to single source electrode driver, each source electrode driver, along with the carrying out of time, can be tuned as control signal Sctrl to have identical phase place.Therefore,, in each source electrode driver, the driving passage being unlocked is at random the control signal that is controlled by same phase.For example, in source electrode driver 120_1, the driving passage being unlocked is at random to be all controlled by phase place not produce the control signal Sctrl of delay, control signal S1 as shown in Figure 4.In source electrode driver 120_2, the driving passage being unlocked is at random all the control signal Sctrl that is controlled by phase place and has been delayed two phase delay times, control signal S3 as shown in Figure 4.
Fig. 8 illustrates that the random unlatching of another embodiment of the present invention drives the schematic diagram of passage.Please refer to Fig. 8, the present embodiment random delay generator 122_1 to 122_M is equally according to mess code signal Srand, the phase place of random delay control signal Sctrl.In Fig. 8, the mess code signal Srand that is passed to source electrode driver 120_1 to 120_M also comprises the information of Arbitrary Digit sequence " 1 → 3 →--->X → 1 ".Be with the embodiment difference of Fig. 7, in the present embodiment, in each source electrode driver, the driving passage being unlocked is at random the control signal that is controlled by out of phase.
For example, in source electrode driver 120_1, in the time of initial sequential, the received Arbitrary Digit of source electrode driver 120_1 is 1.Now, the signal waveform of the control signal S1 that source electrode driver 120_1 goes out as shown in Figure 4 to the phase delay situation of its control signal Sctrl, the phase place of control signal Sctrl does not produce delay hereat.Therefore,, in this initial sequential, the driving passage of reception control signal Sctrl is to be controlled by phase place do not produce the control signal Sctrl of delay and be unlocked.Then,, in the next sequential of initial sequential, the received Arbitrary Digit of source electrode driver 120_1 is all 3 mutually.Now, the signal waveform of the control signal S3 that source electrode driver 120_1 goes out as shown in Figure 4 to the phase delay situation of its control signal Sctrl, the phase place of control signal Sctrl has been delayed two phase delay times hereat.In order, the driving passage of reception control signal Sctrl is to be controlled by phase place be delayed the control signal Sctrl of two phase delay times and be unlocked at this moment.Along with the carrying out of time, source electrode driver 120_1 other sequential time delay control signals Sctrl phase place situation can the rest may be inferred, do not repeat them here.In addition, the phase delay situation of the control signal Sctrl of all the other source electrode drivers can with reference to the Serial No. indicating on each source electrode driver in Fig. 8, the rest may be inferred, do not repeat them here.
It should be noted, in the time of initial sequential, the received Arbitrary Digit of source electrode driver 120_1 to 120_M is identical, is all 1, and it represents the signal waveform of the control signal S1 that each source electrode driver 120_1 to 120_M goes out as shown in Figure 4 to the phase delay situation of its control signal Sctrl.Therefore, in the present embodiment, the driving passage that source electrode driver 120_1 to 120_M is initially unlocked is the control signal that is controlled by same phase, but the present invention is not limited to this.In another embodiment, the driving passage that source electrode driver 120_1 to 120_M is initially unlocked also can be controlled by the control signal of out of phase.
Fig. 9 illustrates that the random unlatching of another embodiment of the present invention drives the schematic diagram of passage.Please refer to Fig. 9, the present embodiment random delay generator 122_1 to 122_M is equally according to mess code signal Srand, the phase place of random delay control signal Sctrl.In Fig. 8, the mess code signal Srand that is passed to source electrode driver 120_1 to 120_M also comprises the information of Arbitrary Digit sequence " 1 → 3 →--->X → 1 ".Be with the embodiment difference of Fig. 8, in the present embodiment, the driving passage that source electrode driver 120_1 to 120_M is initially unlocked is the control signal that is controlled by out of phase.
For example, in the time of initial sequential, the received Arbitrary Digit of source electrode driver 120_1 is 1, the signal waveform of the control signal S1 that its expression source electrode driver 120_1 goes out as shown in Figure 4 to the phase delay situation of its control signal Sctrl.In this simultaneously, the received Arbitrary Digit of source electrode driver 120_2 is 3, the signal waveform of the control signal S3 that the phase delay situation of the control signal Sctrl of its expression source electrode driver 120_2 in the time of initial sequential goes out as shown in Figure 4.The control signal Sctrl of all the other source electrode drivers in the time of initial sequential the Serial No. that indicates on each source electrode driver in can be with reference to Fig. 9 of phase delay situation the rest may be inferred, do not repeat them here.
It is worth mentioning that, in the embodiment of Fig. 6 to Fig. 9, the number of phases X of source electrode driver institute modulation can be greater than, be equal to or less than the driving number of channels of each source electrode driver.
Figure 10 illustrates the flow chart of steps of the driving method of the display panel of one embodiment of the invention.Referring to Fig. 1 and Figure 10, the driving method of the present embodiment display panel comprises the steps.First, in step S100, receiver, video view data Sdata.Then, in step S110, by control signal Sctrl open at random the included driving passage of source electrode driver 120_1 to 120_M at least one of them.Afterwards, in step S120, via at least one of them the driving passage being unlocked at random in source electrode driver 120_1 to 120_M, output video image data Sdata drives display panel 200.Therefore, in the present embodiment, each source electrode driver drives passage to be unlocked at random in different sequential at least partly, with output video image data Sdata.
In addition, the driving method of the present embodiment display panel can, by obtaining enough teachings, suggestion and implementation in the narration of Fig. 1 to Fig. 9 embodiment, therefore repeat no more.
In sum, in exemplary embodiment of the present invention, the driving passage of each source electrode driver is unlocked and output video image data at random in different sequential, the electromagnetic interference (EMI) simultaneously being caused when output video image data to reduce all driving passages.
Finally it should be noted that: above each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these amendments or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (19)
1. a display drive apparatus, in order to drive a display panel, is characterized in that, comprising:
Multiple source electrode drivers, drive this display panel in order to export a vedio data, and wherein respectively this source electrode driver comprises:
Multiple driving passages, respectively this source electrode driver is by a control signal, open at random included those drive passages at least one of them, to allow this, at least one of them drives passage to export this vedio data,
Wherein, in each this source electrode driver, those drive passages to be unlocked at random in different sequential at least partly, to export this vedio data.
2. display drive apparatus according to claim 1, is characterized in that, also comprises:
Time schedule controller, is coupled to those source electrode drivers, and comprises a mess code generator, and this mess code generator for generating one mess code signal is this source electrode driver extremely respectively,
Wherein respectively this source electrode driver according to this mess code signal, open at random included those drive passages at least one of them.
3. display drive apparatus according to claim 2, is characterized in that, respectively this source electrode driver also comprises:
One random delay generator, in order to according to this mess code signal, the phase place of this control signal of random delay, drives passages to be unlocked at random in different sequential to control those.
4. display drive apparatus according to claim 1, is characterized in that, the phase place that respectively this control signal is adjusted in this source electrode driver utilization is controlled those and driven passage to be unlocked at random in different sequential.
5. display drive apparatus according to claim 1, is characterized in that, respectively this driving passage comprises:
One output buffer, has first input end, the second input end and output terminal, and this first input end receives this vedio data, and this second input end is coupled to this output terminal; And
One output switch, has first end, the second end and control end, and this first end is coupled to this output terminal, and this second end is coupled to this display panel, and this control end is controlled by this control signal,
Wherein respectively this source electrode driver is controlled the conducting state of those output switchs by this control signal, drives passage to open or to close those.
6. display drive apparatus according to claim 1, it is characterized in that, when each this source electrode driver by this control signal random open included those drive passages at least one of them time, in those source electrode drivers, it is to be controlled by this control signal of same phase and to be unlocked that those that simultaneously receive this control signal drive passages.
7. display drive apparatus according to claim 1, it is characterized in that, when each this source electrode driver by this control signal random open included those drive passages at least one of them time, in those source electrode drivers, it is to be controlled by this control signal of out of phase and to be unlocked that those that simultaneously receive this control signal drive passages.
8. display drive apparatus according to claim 7, is characterized in that, in each this source electrode driver, it is these control signals that are controlled by same phase that those that are unlocked at random drive passages.
9. display drive apparatus according to claim 7, is characterized in that, in those source electrode drivers, it is this control signal that is controlled by out of phase that those that are initially unlocked drive passage.
10. display drive apparatus according to claim 7, is characterized in that, in those source electrode drivers, it is this control signal that is controlled by same phase that those that are initially unlocked drive passage.
The driving method of 11. 1 kinds of display panels, is suitable for a display drive apparatus, it is characterized in that, this display drive apparatus comprises multiple source electrode drivers, the respectively multiple driving passages of this source electrode driver, and this driving method comprises:
Receive a vedio data;
By a control signal, random open included those of each this source electrode driver drive passages at least one of them; And
Via in each this source electrode driver, be unlocked at random this at least one of them drives passage, export this vedio data, drive this display panel,
Wherein, in each this source electrode driver, those drive passages to be unlocked at random in different sequential at least partly, to export this vedio data.
12. driving methods according to claim 11, is characterized in that, also comprise:
Produce extremely respectively this source electrode driver of a mess code signal; And
According to this mess code signal, random open included those of each this source electrode driver drive passages at least one of them.
13. driving methods according to claim 12, is characterized in that, random open included those of each this source electrode driver drive passages at least one of them step comprise:
According to this mess code signal, the phase place of this control signal of random delay, drives passage to be unlocked at random in different sequential to control those.
14. driving methods according to claim 11, is characterized in that, random open included those of each this source electrode driver drive passages at least one of them step comprise:
The phase place of this control signal of utilization adjustment is controlled respectively those included driving passages of this source electrode driver and is unlocked at random in different sequential.
15. driving methods according to claim 11, it is characterized in that, when by this control signal random open included those of each this source electrode driver drive passages at least one of them time, in those source electrode drivers, it is to be controlled by this control signal of same phase and to be unlocked that those that simultaneously receive this control signal drive passages.
16. driving methods according to claim 11, it is characterized in that, when by this control signal random open included those of each this source electrode driver drive passages at least one of them time, in those source electrode drivers, it is to be controlled by this control signal of out of phase and to be unlocked that those that simultaneously receive this control signal drive passages.
17. driving methods according to claim 16, is characterized in that, in each this source electrode driver, it is these control signals that are controlled by same phase that those that are unlocked at random drive passages.
18. driving methods according to claim 16, is characterized in that, in those source electrode drivers, it is this control signal that is controlled by out of phase that those that are initially unlocked drive passage.
19. driving methods according to claim 16, is characterized in that, in those source electrode drivers, it is this control signal that is controlled by same phase that those that are initially unlocked drive passage.
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