CN101996548B - Driving circuit and display system including the driving circuit - Google Patents
Driving circuit and display system including the driving circuit Download PDFInfo
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Abstract
本发明提供一种显示系统以及用以配合显示系统的驱动电路，其中该驱动电路包含两个驱动单元。第一驱动单元用以接收N笔图像数据，并根据该N笔图像数据中的M笔图像数据驱动该显示系统。第二驱动单元用以由该第一驱动单元接收该N笔图像数据中的其它(N-M)笔图像数据及一组控制信号，并根据该(N-M)笔图像数据与该组控制信号驱动该显示系统。该第一驱动单元会根据该显示系统所处的模式，调整该组控制信号的时序。
The present invention provides a display system and a driving circuit for cooperating with the display system, wherein the driving circuit includes two driving units. The first driving unit is used to receive N sets of image data and drive the display system according to M sets of image data among the N sets of image data. The second driving unit is used to receive the other (NM) sets of image data and a set of control signals from the first driving unit and drive the display system according to the (NM) sets of image data and the set of control signals. The first driving unit adjusts the timing of the set of control signals according to the mode of the display system.
Description
Technical field
The present invention relates to display system, and particularly, the present invention relates in order to cooperate the driving circuit of display system.
Background technology
In recent years, because gradually maturation and manufacturing cost reduction of associated fabrication techniques, the display device of various sizes is all more and more universal.The demand that how to promote the quality of display device and make its display characteristic more press close to the user is all the subject under discussion that its deviser pays much attention to.
See also Fig. 1, Fig. 1 shows the instance of the relativeness of display system 10 and periphery (periphery) driving circuit thereof.In this example, display system 10 itself comprises the display unit 12 of P line, N craspedodrome; P and N are positive integer.N working storage arranged, in order to temporary N the view data (for example GTG value) that sends by the outside source (not shown) in the source electrode driver 16.Each working storage is corresponding to the display unit 12 of a craspedodrome.Gate drivers 14 is responsible for opening one by one the display unit 12 of each line.When the display unit 12 of a certain row is unlocked, source electrode driver 16 can utilize circuit such as operational amplifier will offer N display unit 12 of these row corresponding to the driving voltage of each view data.
If the size of display system 10 is bigger, the ranks number of display unit is more, and single source driving chip may can't drive all display units 12 by one's own efforts because the pin position is not enough.Therefore, source electrode driver 16 possibly be made up of two or more chip for driving in the practical operation.Fig. 2 is the instance that source electrode driver 16 comprises two chip for driving.
First source electrode driver 18 and the normally identical chip of second source electrode driver 20.Generally speaking, provider location is defined as master driver near the source electrode driver of gate drivers 14 on circuit board.In this example, first source electrode driver 18 is a master driver, and 20 of second source electrode drivers are secondary actuator (auxiliary actuator).
Generally speaking, outside source is sent N view data into first source electrode driver 18 successively, and what at first be sent to first source electrode driver 18 is the leftmost view data of whole image.In other words, first source electrode driver 18 can be received by the view data of the picture left side to picture the right successively.In this example, first source electrode driver 18 and second source electrode driver, 20 each self-contained (N/2) individual working storage.First source electrode driver 18 only is responsible for storing (N/2) view data wherein after receiving this N view data, and will be in addition (N/2) view data send second source electrode driver 20 to.
Can find out that by Fig. 2 20 of display unit 12, the second source electrode drivers that first source electrode driver 18 is responsible for driving left side one side of something in the display system 10 are to be responsible for driving the half of display unit 12 of display system 10 right-of-center in political views.Therefore, preceding (N/2) view data in this N view data can be deposited in the working storage of first source electrode driver 18 usually, and back (N/2) view data is then normally deposited in the working storage of second source electrode driver 20.
As shown in Figure 2, except (N/2) view data, also can send one group of control signal that control signal generation circuit 18A is produced to second source electrode driver 20 as first source electrode driver 18 of master driver.The right-hand part of (N/2) view data that second source electrode driver 20 can be received according to oneself and this group control signal driving display system 10.During practical operation, the control signal generation circuit 20A in second source electrode driver 20 may produce one or more and the relevant control signals of second source electrode driver 20 own again according to that group control signal that is sent by first source electrode driver 18.
Fig. 3 (A) and Fig. 3 (B) show the sequential relationship instance of several Control signal and view data.Cycle T is the cycle that outside source will be sent into first source electrode driver 18 corresponding to the data of the display unit 12 of each line.Signal Data representative is sent to the view data of first source electrode driver 18, and signal Data1 representes to be sent to by first source electrode driver 18 view data of second source electrode driver 20.
Can be found out by Fig. 3 (A), be in the time of T in each section cycle, when control signal DE (data enable) is the high levle state, representes that outside source is sent to first source electrode driver 18 with N view data.Preceding (N/2) view data in this N view data is at first deposited in the working storage of itself by first source electrode driver 18.Then, first source electrode driver 18 can be passed to second source electrode driver 20 with back (N/2) view data in this N view data.After second source electrode driver 20 receives these view data, will these view data be deposited in the working storage of oneself.
When control signal Hz is the high levle state, represent that the circuit between each working storage and its follow-up driving circuit (for example operational amplifier) can be switched to off state.(the high levle state can appear twice in the Hz signal within each section cycle T for half source-drain, the HSD) display system of circuit structure for adopting half source electrode-drain electrode.In this example, when the time is intermediate point (t1) and the DE signal appearance potential drop edge (t2) of every section cycle T, each high levle state once in the Hz signal.For the display system that adopts other circuit structure, the high levle state only can appear one time in Hz signal usually within every section cycle T.In addition, control signal POL representative be the polarity of source electrode in the display system 10, and with first source electrode driver 18, that how second source electrode driver 20 controls display system 10 is relevant.
What need explanation is that control signal DE is the signal that is sent to first source electrode driver 18 by outside source, but can't be sent to second source electrode driver 20 by first source electrode driver 18.Control signal POL in this instance, control signal Hz, or other coherent signal all may be transferred into second source electrode driver 20 by first source electrode driver 18.
As discussed previously, first source electrode driver 18 is normally received by the view data of the picture left side to picture the right successively.In some cases, display system 10 must be according to user's specific (special) requirements, with overturning about whole image.If outside source is constant with the order that view data is sent into first source electrode driver 18, then first source electrode driver 18 and second source electrode driver 20 must change the order of store images data, just can reach the effect of overturning about picture.
For example, originally the first stroke data in N view data can be stored in first source electrode driver 18 working storage corresponding to the display unit 12 of high order end on the entity; Under the situation of overturning about picture, these the first stroke data will be stored in second source electrode driver 20 working storage corresponding to the display unit 12 of low order end on the entity.The shown view data sequential chart that is in this case of Fig. 3 (B).Signal Data1 by among Fig. 3 (B) can find out that first source electrode driver 18 at first is sent to second source electrode driver 20 with preceding (N/2) view data in this N view data, back (N/2) view data is deposited in the working storage of oneself again.
In practical application, gate drivers 14, first source electrode driver 18 and second configuration of source electrode driver 20 on entity also maybe be as shown in Figure 4.If still will sending into first source electrode driver, 18, the first source electrode drivers 18 to the view data on picture the right by the whole image left side earlier in regular turn, outside source also must send preceding (N/2) view data in this N view data to second source electrode driver 20 earlier.
First source electrode driver 18 and second source electrode driver 20 normally are set on same printed circuit board (PCB) or the glass substrate.As is known to the person skilled in the art, in order to there being dead resistance on the cabling that connects these two drivers inevitably, and the size of this resistance is relevant with the character or the cabling mode of substrate itself.
First source electrode driver 18 and both ground wires of second source electrode driver 20 are connected with each other.Receive the influence of above-mentioned dead resistance, compare with first source electrode driver 18, the earth point voltage ratio of second source electrode driver 20 is unstable.When control signal that is sent to second source electrode driver 20 by first source electrode driver 18 or the conversion of view data generation voltage status, obvious noise pulse (shown in Fig. 3 (A), Fig. 3 (B)) can appear on the earth terminal GND of second source electrode driver 20.
If noise spike be occur in first source electrode driver 18 view data is deposited in itself working storage during this period of time in, be unlikely usually can impact to these view data.Yet; If the noise spike on the earth terminal GND of second source electrode driver 20 is to occur in time of working storage that view data deposited in second source electrode driver 20; Just influence the judgement of 20 pairs of voltage quasi positions of second source electrode driver probably, and then cause the unusual or wrong situation of view data that deposits in the working storage.
In addition, the change in voltage of view data also may cause and occurs noise on the earth terminal.The control signal that is sent to second source electrode driver 20 by first source electrode driver 18 may receive the noise of earth terminal equally, and unusual or mistake take place.No matter be the unusual or mistake of view data or control signal, all can be reflected at and present in the picture that the user watches.
With regard to above control signal instance, if preceding (N/2) view data among the signal Data is deposited in the working storage (shown in Fig. 3 (A)) of first source electrode driver 18, the noise spike that then occurs in time t1 can not damage these data usually.Yet; If display system 10 must be with overturning about picture; Or the physical arrangements of these drivers is as shown in Figure 4; Preceding (N/2) view data among the signal Data will be deposited in the working storage (shown in Fig. 3 (B)) of second source electrode driver 20 earlier, and therefore the noise spike that occurs in time t1 can destroy these view data that is passed to second source electrode driver 20 or control signals probably.
Summary of the invention
For addressing the above problem, the invention provides a kind of driving circuit in order to the cooperation display system, avoid the ruined situation of view data through the sequential of in good time adjustment control signal.
A kind of embodiment according to the present invention is a driving circuit, wherein comprises first driver element and second driver element.This first driver element is in order to N view data of reception, and according to M this display system of view data driving in this N view data, N and M are respectively positive integer, and M is less than N.This second driver element is electrically connected to this first driver element; In order to receiving other (N-M) view data and one group of control signal in this N view data by this first driver element, and according to this (N-M) view data and this this display system of group control signal driving.
When display system that this driving circuit cooperated is in first pattern; This first driver element should be organized control signal with first sequential and be sent to this second driver element; When this display system is in second pattern, this first driver element should be organized control signal with second sequential and be sent to this second driver element.In other words, this first driver element can change the sequential of this group control signal according to the residing pattern of display system in good time, reaches the situation of avoiding noise spike to destroy view data and control signal thus.
In a kind of embodiment of driving circuit of the present invention; This first driver element comprises M first working storage; This second driver element comprises (N-M) individual second working storage; This first driver element receives this N view data successively, and when this display system is in this first pattern, this first driver element deposits preceding M view data in this N view data in this M first working storage in first period earlier; In second period back (N-M) view data in this N view data is sent to this second driver element again, this second driver element should back (N-M) view data deposit this (N-M) individual second working storage in.
Preferably, when this first driver element transmits with this first sequential should group control signal, this first driver element should organize that at least one transform strike slip boundary was arranged in outside this second period in the control signal.
In a kind of embodiment of driving circuit of the present invention; This first driver element comprises M first working storage; This second driver element comprises (N-M) individual second working storage; This first driver element receives this N view data successively, and when this display system is in this second pattern, this first driver element is sent to this second driver element in first period with preceding (N-M) view data in this N view data earlier; This second driver element should deposit in after this (N-M) individual second working storage by preceding (N-M) image, and this first driver element deposits back M view data in this N view data in this M first working storage in second period again.
Preferably, when this first driver element transmits with this second sequential should group control signal, this first driver element should organize that at least one transform strike slip boundary was arranged in outside this first period in the control signal.
In a kind of embodiment of driving circuit of the present invention, this group control signal comprises clock signal.
In a kind of embodiment of driving circuit of the present invention; This first driver element comprises first control signal generation circuit and second control signal generation circuit; This first control signal generation circuit has this group control signal of this first sequential in order to generation; This second control signal generation circuit has this group control signal of this second sequential in order to generation; When this display system is in this first pattern; This first driver element is sent to this second driver element with this group control signal that this first control signal generation circuit is produced, and when this display system is in this second pattern, this first driver element is sent to this second driver element with this group control signal that this second control signal generation circuit is produced.
According to another embodiment of the invention is a kind of display system, comprises:
N craspedodrome display unit;
First driver element is electrically connected to the M craspedodrome display unit in this N craspedodrome display unit, and in order to N view data of reception, and according to M this M craspedodrome display unit of view data driving in this N view data, N and M are respectively positive integer, and M is less than N; And
Second driver element; Be electrically connected to (N-M) craspedodrome display unit in this first driver element and this N craspedodrome display unit; In order to receiving other (N-M) view data and one group of control signal in this N view data, and drive this (N-M) craspedodrome display unit according to this (N-M) view data and this group control signal by this first driver element;
Wherein work as this display system and be in first pattern; This first driver element should be organized control signal with first sequential and be sent to this second driver element; When this display system is in second pattern, this first driver element should be organized control signal with second sequential and be sent to this second driver element.
In a kind of embodiment of display system of the present invention; This first driver element comprises M first working storage; This second driver element comprises (N-M) individual second working storage; This first driver element receives this N view data successively, and when this display system is in this first pattern, this first driver element deposits preceding M view data in this N view data in this M first working storage in first period earlier; In second period back (N-M) view data in this N view data is sent to this second driver element again, this second driver element should back (N-M) view data deposit this (N-M) individual second working storage in.
Preferably, when this first driver element transmits with this first sequential should group control signal, this first driver element should organize that at least one transform strike slip boundary was arranged in outside this second period in the control signal.
In a kind of embodiment of display system of the present invention; This first driver element comprises M first working storage; This second driver element comprises (N-M) individual second working storage; This first driver element receives this N view data successively, and when this display system is in this second pattern, this first driver element is sent to this second driver element in first period with preceding (N-M) view data in this N view data earlier; This second driver element should deposit in after this (N-M) individual second working storage by preceding (N-M) image, and this first driver element deposits back M view data in this N view data in this M first working storage in second period again.
Preferably, when this first driver element transmits with this second sequential should group control signal, this first driver element should organize that at least one transform strike slip boundary was arranged in outside this first period in the control signal.
In a kind of embodiment of display system of the present invention, this group control signal comprises clock signal.
In a kind of embodiment of display system of the present invention; This first driver element comprises first control signal generation circuit and second control signal generation circuit; This first control signal generation circuit has this group control signal of this first sequential in order to generation; This second control signal generation circuit has this group control signal of this second sequential in order to generation; When this display system is in this first pattern; This first driver element is sent to this second driver element with this group control signal that this first control signal generation circuit is produced, and when this display system is in this second pattern, this first driver element is sent to this second driver element with this group control signal that this second control signal generation circuit is produced.
Can graphicly further be understood through following detailed Description Of The Invention and appended about advantage of the present invention and spirit.
Description of drawings
Fig. 1, Fig. 2 and Fig. 4 show the instance of the relativeness of display system of the prior art and peripheral drive circuit thereof.
Fig. 3 (A) and Fig. 3 (B) show the instance of the sequential relationship of control signal and view data in the prior art.
Fig. 5 (A) and Fig. 5 (B) show the embodiment according to display system of the present invention and peripheral drive circuit thereof.
Fig. 6 (A) and Fig. 6 (B) are the sequential chart according to control signal of the present invention and view data.
Embodiment
Be driving circuit according to a particular embodiment of the invention, Fig. 5 is the calcspar of the display system of this driving circuit and cooperation thereof.This driving circuit comprises first driver element 24 and second driver element 26.First driver element 24 is in order to being received N view data by the outside source (not shown), and drives this display system according to M view data in this N view data.N and M are respectively positive integer, and M is less than N.For instance, N possibly equal 1024, and M possibly equal 512.
Generally speaking, outside source is sent this N view data into first driver element 24 successively, and what at first be sent to first driver element 24 is the leftmost view data of whole image.In other words, first driver element 24 can be received by the view data of the picture left side to picture the right successively.First driver element 24 only is responsible for storing M view data wherein after receiving this N view data, and can send (N-M) view data in addition to second driver element 26.First driver element 24 comprises M first working storage, and second driver element 26 comprises (N-M) individual second working storage, respectively in order to temporary above-mentioned view data.
In this embodiment, first driver element 24 also comprises the first control signal generation circuit 24A and the second control signal generation circuit 24B.The first control signal generation circuit 24A is responsible for producing one group and has the first time sequence control signal; The second control signal generation circuit 24B is responsible for producing one group and has the second time sequence control signal.Can will be with having first sequential or the second time sequence control signal sends second driver element 26 to according to first driver element 24 according to the present invention according to display system 10 residing patterns decisions.
In the practical operation, the first control signal generation circuit 24A also can be integrated into the single control signal generation circuit that can produce two kinds of different time sequence control signals with the second control signal generation circuit 24B.
As shown in Figure 5, first driver element 24 can be through switch S 1 and the S2 among the On/Off figure, control will be sent to second driver element 26 control signal why.When display system 10 was in first pattern, first driver element 24 was sent to second driver element 26 with the control signal that the first control signal generation circuit 24A is produced.When display system 10 was in second pattern, first driver element 24 was sent to second driver element 26 with the control signal that the second control signal generation circuit 24B is produced.
For instance, the situation that must be deposited in first driver element 24 of preceding M view data in this N view data can be defined as display system 10 and is in first pattern.Relatively, the situation that must be deposited in first driver element 24 of back M view data in this N view data can be defined as display system 10 and is in second pattern.
More particularly; When display system 10 is in first pattern; First driver element 24 can deposit preceding M view data in this N view data in M first working storage of itself in first period earlier, then in second period back (N-M) view data in this N view data is sent to second driver element 26 again.When display system 10 is in second pattern, 24 of first driver elements are in first period preceding (N-M) view data in this N view data to be sent to second driver element 26 earlier.Second driver element 26 should deposit in after this (N-M) individual second working storage by preceding (N-M) image, and first driver element 24 then deposits back M view data in this N view data in M first working storage of oneself in second period again.
Explain as previous; When the physical arrangements of gate drivers 14, first driver element 24 and second driver element 26 shown in Fig. 5 (A); And under the situation of about user's failed call display system 10 is with picture, overturning, preceding M view data in this N view data can be deposited earlier in first driver element 24.In addition; When the physical arrangements of gate drivers 14, first driver element 24 and second driver element 26 shown in Fig. 5 (B); And under the situation of about the user requires display system 10 with picture, overturning, preceding M view data in this N view data can be deposited in first driver element 24 earlier too.Therefore, the display system in both of these case 10 all is to be in first pattern that defines in the above paragraph.
Relatively; When the physical arrangements of gate drivers 14, first driver element 24 and second driver element 26 shown in Fig. 5 (A); And under the situation of about the user requires display system 10 with picture, overturning, preceding (N-M) in this N view data view data can be deposited earlier in second driver element 26.In addition; When the physical arrangements of gate drivers 14, first driver element 24 and second driver element 26 shown in Fig. 5 (B); And under the situation of about user's failed call display system 10 is with picture, overturning, preceding (N-M) view data in this N view data can be deposited in second driver element 26 earlier too.Therefore, the display system in both of these case 10 all is to be in second pattern that defines in the above paragraph.
Fig. 6 (A) is for having the instance of the first time sequence control signal.Cycle T is the cycle that outside source will be sent into first driver element 24 corresponding to the data of the display unit 12 of each line.Signal Data representative is sent to the view data of first driver element 24, and signal Data1 representes to be sent to by first driver element 24 view data of second driver element 26.
In this example; Control signal Hz can occur twice high levle state every section cycle T with interior, and the current potential transform strike slip boundary of Hz signal (transition edge) is arranged near the intermediate point (time t1) of DE signal appearance potential drop edge (time t2) and cycle T.The current potential transform strike slip boundary of control signal POL then is to be arranged at time t1.Can find out that by Fig. 6 (A) the current potential transform strike slip boundary with the first time sequence control signal Hz and POL all occurs in first driver element 24 and will be somebody's turn to do (N-M) view data and send to outside second period of second driver element 26.
Fig. 6 (B) is for having the instance of the second time sequence control signal.In this example, the high levle state of Hz signal is arranged at the centre (time t4) of (time t3) before each DE signal appearance potential rising edge and per two time t3.The current potential transform strike slip boundary of control signal POL then is to be arranged at time t4.Can find out that by Fig. 6 (B) the current potential transform strike slip boundary with the second time sequence control signal Hz and POL all is to occur in first driver element 24 will be somebody's turn to do (N-M) view data and send to outside first period of second driver element 26.
Except control signal instance Hz and the POL among Fig. 6 (A), Fig. 6 (B), the control signal that first driver element 24 sends second driver element 26 to also possibly comprise clock signal or other signal.In above instance, no matter display system 10 is to be in first pattern or second pattern, and the current potential transform strike slip boundary of these control signals all is arranged at first driver element 24 view data was sent to outside the period of second driver element 26.Therefore, these control signals also all can occur in outside the period of second driver element, 26 reception view data at the noise spike that earth terminal caused.
As discussed previously, if noise spike be occur in first driver element 24 with view data deposit in itself working storage during this period of time in, can not impact usually these view data.Yet,, just influence the judgement of 26 pairs of voltage quasi positions of second driver element probably, and then cause the situation of the view data mistake that deposits in the working storage if noise spike is to occur in time of working storage that view data deposited in second driver element 26.
Be arranged in second driver element 26 through one or more current potential transform strike slip boundaries and receive outside the period of view data, can effectively reduce the probability of the noise spike destruction view data of earth terminal according to driving circuit of the present invention control signal.Even about the user requires picture, overturn, or under the reformed situation of the physical arrangements of driving circuit, as long as first driver element 24 provides and has suitable time sequence control signal, the situation that just can avoid view data to be destroyed.
Similarly, be arranged in second driver element 26 through current potential transform strike slip boundary and receive outside the period of view data, also can reduce the probability that control signal receives the noise spike interference of earth terminal according to driving circuit of the present invention with control signal.
For comprising the display system of all component among Fig. 5 (A), its principle of operation is identical with previous embodiment according to another embodiment of the present invention, therefore repeats no more.
Driving circuit according to the present invention is the sequential that offers the control signal of secondary actuator through suitable arrangement master driver, reaches to avoid the ruined purpose of view data.Design of the present invention is not only applicable to the situation that the source electrode driver of display system is made up of two chip for driving.In other words, design of the present invention also can be applied to the situation that source electrode driver is made up of a plurality of chip for driving.
Through the detailed description of above preferred specific embodiment, hope can be known description characteristic of the present invention and spirit more, and is not to come protection scope of the present invention is limited with the above-mentioned preferred specific embodiment that is disclosed.On the contrary, its objective is that hope can be in the arrangement of various changes of the encompasses of the claimed claim of the present invention and tool equality.The primary clustering symbol description
10: display system 12: display unit
14: gate drivers 16: source electrode driver
20: the second source electrode drivers of 18: the first source electrode drivers
18A, 20A: 24: the first driver elements of control signal generation circuit
26: the second driver element S1, S2: switch
24A: first control signal generation circuit
24B: second control signal generation circuit.
Claims (14)
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Effective date of registration: 20201026 Address after: Room 1501, No. 1168, South Renmin Road, Kunshan Development Zone, Suzhou City, Jiangsu Province Patentee after: Kunshan ruichuangsin Electronics Co.,Ltd. Address before: Hsinchu City, Taiwan, China Patentee before: Raydium Semiconductor Corp. |