CN1841483A - Control signal transmission method for liquid crystal display - Google Patents
Control signal transmission method for liquid crystal display Download PDFInfo
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- CN1841483A CN1841483A CN 200510063923 CN200510063923A CN1841483A CN 1841483 A CN1841483 A CN 1841483A CN 200510063923 CN200510063923 CN 200510063923 CN 200510063923 A CN200510063923 A CN 200510063923A CN 1841483 A CN1841483 A CN 1841483A
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Abstract
The control signal transmission method for LCD comprises: compacting different control signal into package with header label field to control package initiation and control item contained control field and data field for affair and parameters; then, synthesizing all packages and transmitting on a few or single wire.
Description
Technical field
The present invention is relevant for a kind of LCD, and particularly relevant for a kind of employing glass plate base Chip Packaging (Chip On Glass, LCD COG).
Background technology
In view of advantages such as light, thin and low radiation, LCD replaces the cathode ray tube (CRT) display gradually and becomes the main flow of computer screen and TV.Except being devoted to improve the display quality of LCD, as color, contrast and brightness etc., manufacturer also is devoted to improve its production technology with the speed production flow process and reduce production costs.
LCD is with time schedule controller, source electrode driver and gate driver drive liquid crystal panel.Traditional time schedule controller, source electrode driver and gate drivers are welded in a printed circuit board (PCB) (Printed Circuit Board respectively, PCB), and then (Flexible PrintedCircuit Board FPC) is electrically connected with liquid crystal panel to pass through flexible circuit board.Therefore, traditional LCD needs three printed circuit board at least, and its production procedure is comparatively complicated.Along with development of technology, manufacturer has developed employing glass plate base Chip Packaging (Chip On Glass, LCD COG) is to simplify production procedure.
Fig. 1 is that tradition adopts glass plate base Chip Packaging (Chip On Glass, LCD synoptic diagram COG).LCD 100 comprises panel 110, multiple source driver 112, at least one gate drivers 114, printed circuit board (PCB) 120 and flexible circuit board 130.These source electrode drivers 112 are arranged on the glass substrate of panel 110 with gate drivers 114, are electrically connected with printed circuit board (PCB) 120 by corresponding flexible circuit board 130 respectively.Printed circuit board (PCB) 120 is provided with the time schedule controller (not shown), to receive view data and control signal, sends each source electrode driver 112 and gate drivers 114 to by these flexible circuit boards 130 again after the processing.
Yet, tradition adopt glass plate base Chip Packaging (Chip On Glass, the needed flexible circuit board of LCD COG) is more, for instance, promptly needs 11 at the example of Fig. 1, its production procedure still has necessity of simplification.In addition, except simplifying production procedure, the number of minimizing flexible circuit board also can reduce the contact number between flexible circuit board and liquid crystal panel, and then reduces the probability of fault.
Summary of the invention
In view of this, purpose of the present invention is exactly that a kind of LCD that adopts glass plate base Chip Packaging is being provided, and it can utilize the minority flexible circuit board to realize the purpose of data transmission.
In addition, the present invention also proposes a kind of production method of grid control signal, with the number of further minimizing flexible circuit board.
In addition, cooperate LCD of the present invention, the present invention also proposes a kind of recognition method of source electrode driver.
In addition, cooperate LCD of the present invention, the present invention also proposes a kind of source electrode driver, is received from the view data and the control signal of time schedule controller with unidirectional or transmitted in both directions.
In addition, cooperate LCD of the present invention, control signal can also be utilized bag (packet) transmission technology, is incorporated into minority or plain conductor, with the lead number of further minimizing flexible circuit board.
In addition, the present invention also proposes a kind of electric power management mechanism, to reduce the electrical source consumption of LCD.
According to above-mentioned and other purpose, the present invention proposes a kind of control signal transmission method of LCD, with the control signal of transmission time schedule controller.This method is at first distinguished boil down to one control signal bag with each control signal of sequential control.Each control signal bag has header field and control project, and header field is initial in order to the identification control signal packet, and this control project also comprises control field and data field.Control field is in order to write down the kind of an incident, and data field is in order to write down the parameter of this incident.Then, each control signal bag is comprehensive and be transmitted on minority or the plain conductor.
According to another object of the present invention, a kind of control signal analytic method of LCD is proposed, be used for the one source pole driver, to resolve control signal from time schedule controller.From each control signal of sequential control boil down to one control signal bag, and comprehensive and be transmitted on minority or the plain conductor respectively.And each control signal bag has a header field and a control project, and header field is in order to discern the initial of a control signal bag, kind and the parameter of control project in order to write down a corresponding incident.This method at first determines the header field position of each control signal bag according to a predetermined pattern, to extract the control project of each control signal bag.Then resolve the control project of each control signal bag, with kind and the parameter that obtains each corresponding incident.Implement the corresponding incident of each control signal bag then, to form each control signal of time schedule controller.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. are described in detail as follows:
Fig. 1 is the LCD synoptic diagram that tradition adopts glass plate base Chip Packaging.
Fig. 2 A is a kind of LCD synoptic diagram that adopt glass plate base Chip Packaging of expression according to a preferred embodiment of the present invention.
Fig. 2 B is glass plate base Chip Packaging is adopted in expression according to the another kind of a preferred embodiment of the present invention LCD synoptic diagram.
Fig. 3 is the control signal synoptic diagram of the driver of LCD.
Fig. 4 is the form synoptic diagram of control signal bag.
Fig. 5 A is a kind of source electrode driver calcspar according to preferred embodiment of the present invention.
Fig. 5 B is the waveform generator calcspar of Fig. 5 A source electrode driver.
Fig. 5 C is the calcspar of Fig. 5 B identity recognizer.
Fig. 5 D is the waveform synoptic diagram that produces control signal POL.
Fig. 5 E is the waveform synoptic diagram that produces control signal TP.
Fig. 6 A be can power saving reducing-pitch thread data transmission method synoptic diagram.
Fig. 6 B be can power saving burst type (burst) data transmission method synoptic diagram.
The primary clustering symbol description
100,200: LCD
110,210: panel
112,212: source electrode driver (S/D)
114,214: data driver
120、220：PCB
130、230、232：FPC
225: time schedule controller
310: header field
312: control field
314: data field
410,412: receiver
413,415: transceiver
414,416: the control transceiver
424,426: data collector
420,421: waveform generator
422: bus switch
434: driver element
451: resolver
453: identity recognizer
456: comparing unit
460: signal generator
470: the initial setting device
Embodiment
Please refer to Fig. 2 A, it is a kind of employing glass plate base Chip Packaging (Chip On Glass, COG) the LCD synoptic diagram of expression according to preferred embodiment of the present invention.LCD 200 comprises: and panel 210, multiple source driver (Source Driver, S/D) 212 (1)-211 (10), at least one gate drivers (Gate Driver) 214, printed circuit board (PCB) 220 and flexible circuit board 230 and 232.These source electrode drivers 212 are arranged on the glass substrate of panel 210 with gate drivers 214.Printed circuit board (PCB) 220 is provided with time schedule controller 225, to receive view data and control signal, sends source electrode driver 212 (3) and 212 (8) respectively to by flexible circuit board (FPC) 230 and 232 again after the processing.Source electrode driver 212 (3) and 212 (8) sends view data and the source control signal that receives to contiguous source electrode driver 212 (1), 212 (2), 212 (4), 212 (5) and 212 (6), 212 (7), 212 (9), 212 (10) by the lead on the glass substrate respectively again.Based on the source control signal that receives, a source electrode driver on the glass basis plate, for example:, just can produce grid control signal G, to offer gate drivers 214 near the source electrode driver 212 (1) of gate drivers 214.Select source electrode driver 212 (1) near gate drivers 214 can effectively shorten conductor length with gate drivers 214, avoid unnecessary signal delay and distortion.But, in other embodiments, source electrode driver 212 (1) other source electrode driver in addition can also be used to producing grid control signal G.In the present embodiment, because the lead transmission signals that LCD 200 adopts on the glass substrate, do not need to be provided with a plurality of flexible circuit boards with corresponding each source electrode driver and gate drivers, so LCD 200 needed flexible circuit board numbers can reduce greatly.
In the present embodiment, source electrode driver 212 has first pattern and second pattern.Source electrode driver 212 (3) and 212 (8) is set at first pattern, can reach left simultaneously and transfer data to adjacent source electrode driver 212 to the right two-wayly, other source electrode driver 212 (1), 212 (2), 212 (4)～212 (7), 212 (9) and 212 (10) is set at second pattern, only can the single direction transmission.The source electrode driver 212 (3) of first pattern and 212 (8) can be respectively receives two set of image data and control signals by time schedule controller 225, and the view data that receives and control signal reached left respectively transfers to other source electrode driver to the right.The source electrode driver 212 (1), 212 (2), 212 (4)～212 (7), 212 (9) and 212 (10) of second pattern to receive view data and the control signal that the left side or the right source electrode driver transmit, can't directly be electrically connected with time schedule controller 225 only.In the present embodiment, because LCD 200 is the large scale liquid crystal display, with 10 source electrode drivers is example, in view of signal delay and the distortion that the lead dead resistance on glass substrate and electric capacity cause, present embodiment can two flexible circuit board 230 and 232 transmission data.Yet the actual design adjustment of the number visible liquid crystal display of flexible circuit board is not limited to two flexible circuit boards, as long as signal delay and distortion that lead dead resistance on glass substrate and electric capacity cause are maintained at tolerance interval.
In the present embodiment, the source electrode driver 212 of liquid crystal panel can be divided into 212 (6)-212 (10) two groups of left side source electrode driver 212 (1)-212 (5) and the right source electrode drivers, two 230,232 of flexible circuit boards are electrically connected on the central source electrode driver 212 (3), 212 (8) of two groups of source electrode drivers respectively, so, just effective minimization of the signal delay that causes of lead dead resistance on glass substrate and electric capacity and distortion.In like manner, actual design based on LCD, the source electrode driver 212 of liquid crystal panel can also be divided into more than three groups, and the flexible circuit board more than three can also be electrically connected on respectively in the scope of respectively organizing source electrode driver, as long as signal delay and distortion that lead dead resistance on glass substrate and electric capacity cause are maintained at tolerance interval.
Fig. 2 B is employing glass plate base Chip Packaging (Chip OnGlass, LCD 250 synoptic diagram COG) according to another preferred embodiment of the present invention.Different being in the right-hand member of panel 210 of the LCD 200 among LCD 250 and Fig. 2 A has more another gate drivers 216, drives with the two ends from each bar scanning linear.Remaining component Fig. 2 A is identical, repeats no more in this.
Fig. 3 is the control signal synoptic diagram of the driver of LCD.Control signal can be divided into grid control signal G and source control signal S.For instance, grid control signal G comprise gate drivers start signal STV (Gate Driver Start Signal) with the beginning of representing a picture, gate clock signal CPV (Gate Clock Signal) to enable gate line, enable the enabling time of signal OEV (Gate Driver Output Enable Signal) with gate drivers output with the definition gate line.In addition, for instance, source control signal S comprise source electrode driver start signal STH (Source DriverStart Signal) so that source electrode driver 212 begin prepare to show a horizontal line, data enable signal DE (Data Enable Signal) to begin to receive data, load signal TP (Load Signal) so that source electrode driver 212 outputting drive voltages to data line, and polarity control signal POL with control reversal of poles.
When source electrode driver start signal STH enabled, source electrode driver 212 just began to prepare to receive data.Behind a period td1, data enable signal DE promptly transfers high level to, and time schedule controller 225 just begins output image data and gives source electrode driver 212.Source electrode driver 212 can be according to polarity control signal POL decision polarity, to produce the output voltage of opposed polarity.Then, load signal TP can enable so that source electrode driver 212 begins outputting drive voltages to panel 210.
In known LCD 100, control signal is issued each source electrode driver 112 and gate drivers 114 by time schedule controller.The transmission mode of known control signal is used control signal of a lead transmission, therefore needs many leads to transmit these control signals.And because time schedule controller has dead resistance and stray capacitance to the lead of each source electrode driver 112 and gate drivers 114, control signal also is easy to generate delay and influences display quality.
In the present embodiment, time schedule controller 225 comprehensively is control signal stream C with these control signals, and is transferred to source electrode driver 212 with a lead.For instance, control signal stream C can use the bag host-host protocol respectively with a plurality of control signal boil down tos control signal bag independently, with the dependent event of representing each control signal and be transmitted on the same lead.Time schedule controller 225 can utilize purpose identification code signal, specifies the control signal bag that transmits should give which source electrode driver 212.For instance, purpose identification code signal can also be contained in the control signal bag, extracts and contrast so that each source electrode driver 212 to be provided.Behind the control signal bag of receiving control signal stream C, source electrode driver 212 just can solve the control signal that needs voluntarily.So, transmitting the required lead of control signal just can significantly reduce.
Because whether the control signal bag that source electrode driver 212 needs identifications receive is to oneself, therefore, each source electrode driver also needs built-in identification code signal, compares with the purpose identification code signal with time schedule controller 225.
[host-host protocol of control signal stream]
The transmission mode of known control signal is that each uses a lead to control signal to source electrode driver and/or gate drivers from one of time schedule controller transmission, source electrode driver and gate drivers need a plurality of control signals respectively, therefore time schedule controller is a lot of to the lead number of each source electrode driver and gate drivers, make that the circuit of flexible circuit board (FPC) is more, increase cost and instability.In addition, dead resistance that causes owing to lead is long and stray capacitance also can make control signal produce delay and distortion influences display quality.
In the present embodiment, time schedule controller 225 only transmits control signal stream C by a lead and gives source electrode driver 212.Utilize the bag transmission technology, for instance, control signal stream C can comprise a plurality of control signal bags, and the content of each control signal bag can be represented (pull high) incident of drawing high of corresponding control signal or drag down (pull low) incident.After source electrode driver 212 was received the control signal bag, corresponding control signal just can be drawn high or be dragged down, to produce various required control signals.
Fig. 4 is the form synoptic diagram of control signal bag.A control signal bag comprises header field 310 and control project, and wherein, the control project comprises control field 312 and data field 314.Header field 310 record one predetermined patterns (pattern), in order to discern the initial of a control signal bag, predetermined pattern is for example represented with 0x11111.Control field 312 is in order to the kind of recording events.Kind of event comprises signal STH incident, signal TP incident at least, draws high incident, drags down incident and initial setting incident.Data field 314 is in order to write down the parameter of this incident.
In the present embodiment, having 16 positions with each control signal bag is example, if adopt dual edge sampling (dual edge sampling) to receive bag, the time for reading of each control signal bag is 8 time clock, that is to say, the high level that the control signal that incident is drawn high in utilization and the incident that drags down produces needs to have 8 time clock is at least held time, and promptly can utilize the incident of drawing high and drag down the incident generation as control signal POL, CPV, STV, OEV.In addition, high level is held time less than the control signal of 8 time clock, as control signal STH and TP, and then can be after difference received signal STH incident and signal TP incident, signal level is drawn high, promptly transferred to low level voluntarily through scheduled time slot td2 and tw1 respectively.The application is not limited to use the dual edge sampling, also can use the mode of rising edge or falling edge sampling to receive bag in addition, repeats no more in this.
Control signal Bao Eryan with control field 312 tracer signal STH incidents, it is in order to enable the control signal STH of each source electrode driver 212 (1)-212 (10), and 414 of its data fields are the purpose identification code signals of the purpose source electrode driver 212 of this control signal bag of expression.For instance, if the chip identification coded signal of source electrode driver 212 (1)-212 (10) is respectively 0x0001-0x1010, after source electrode driver 212 (1) received that its data field 414 of this control signal Bao Bingcong learns that the purpose identification code signal (ID) of purpose source electrode driver is 0x0001, the source electrode driver 212 (1) with identical chips identification code just can produce signal STH voluntarily and come display horizontal line to begin preparing to receive data.After control signal STH draws high, through just being converted to low level voluntarily behind the scheduled time slot td2.
In addition, because signal TP and CPV draw high simultaneously, control signal Bao Eryan with control field 312 tracer signal TP incidents, it is in order to enable control signal TP and CPV, wherein, control signal TP is that low level, control signal CPV then need to receive just can draw behind the control signal bag of the incident that drags down of record CPV signal and is low level through just drawing automatically behind the scheduled time slot tw1.
Signal POL, STV and OEV etc. can each draw high the control signal bag of incident and record via a record and drag down the control signal bag of incident and produce.Draw high the control signal Bao Eryan of incident with control field 312 record, the signal that its data field 314 is desired to draw high in order to record is as signal POL, STV or OEV.Drag down the control signal Bao Eryan of incident with control field 312 record, the signal that its data field 314 is desired to drag down in order to record is as signal POL, STV or OEV.
With the control signal Bao Eryan of control field 312 record initial setting incidents, it is in order to set various initial set value, for example, and the fan-out capability of source electrode driver 212 etc.The control signal bag also can write down the incident of other kind, illustrates no longer one by one in this.
In the present embodiment, utilize the control signal of control signal stream C transmission packetize, lead of minimum needs can transmit.Therefore, transmit all lead numbers that control signal to each source electrode driver 212 from time schedule controller 225 and can greatly reduce, and then simplify the layout complexity of circuit and increase product stability.In addition, cooperate lead frequency range and actual design, control signal stream C can also optionally only comprehensive a part of control signal and independent transmission another part control signal.In this case, though full control signal may not be certain all to be incorporated into a lead, the lead number still can reduce.
[source electrode driver]
Fig. 5 A is a kind of source electrode driver calcspar according to preferred embodiment of the present invention.Source electrode driver 212 comprises: receiver 410,412, transceiver 413,415, bus switch 422, waveform generator 420,421 and driver element 434.Transceiver 413 comprises: control transceiver 414 and data collector 424, transceiver 415 comprises: control transceiver 416 and data collector 426.
Work as source electrode driver, as 212 (1)-212 (2), 212 (4)-212 (7), 212 (9)-212 (10), when being in second pattern, receiver 410 and 412 is for forbidding (disabled), bus switch 422 can be with switch SW 1 and SW2 closure, so that transceiver 413 is electrically connected with transceiver 415, that is: data collector 424 is electrically connected with data collector 426, control transceiver 414 with control transceiver 416 and be electrically connected.So, control signal stream and the view data received of the left side or the right control transceiver 414,416 and data collector 424,426 just can send next source electrode driver to according to assigned direction.
Each receives waveform generator 420,421 control signals stream C1, C2, and produces source control signal according to this, as STH (1), STH (2), POL (1), POL (2), TP (1), TP (2) etc., in view of the above, grid control signal G, just can produce as CPV (1), CPV (2), STV (1), STV (2), OEV (1), OEV (2) etc., wherein, grid control signal G can be produced by a selected source electrode driver.With the LCD among Fig. 2 A 200 is example, a source electrode driver 212 on the glass substrate, for example be near the source electrode driver 212 (1) of gate drivers 214, can be used for producing grid control signal G, source electrode driver 212 (1) other source electrode driver in addition then can not produce grid control signal G.In addition, with the LCD among Fig. 2 B 250 is example, two source electrode drivers on the glass substrate, for example be near the source electrode driver 212 (1) and 212 (10) of grid 214 and 216, can be used for producing grid control signal G respectively to gate drivers 214 and 216, source electrode driver 212 (1) and 212 (10) other source electrode driver in addition then can not produce grid control signal G.
After driver element 434 is received control signal STH, promptly begin lock image data D, then view data D is converted to the corresponding simulating driving voltage according to polar signal POL, after receiving load signal TP, driving voltage is sent to panel 210 then.
With source electrode driver 212 (3) is example, and it is in first pattern, and waveform generator 420,421 can start simultaneously, receiving control signal stream C1, C2 respectively, and produces and is used for source control signal and the grid control signal of transmit image data D1, D2.At this moment, control signal stream C1, C2 and view data D1 and D2 are independent each other.In addition, be example with source electrode driver 212 (2) or 212 (4), it is in second pattern, and both can turn-off or omit one waveform generator 420,421.At this moment, because control signal stream C1, C2 and view data D1 and D2 are communicated with each other, no matter control signal stream C is received by waveform generator 420 or 421, and source electrode driver 212 (2) or 212 (4) all can correctly produce source control signal, and produce correct grid control signal in view of the above.In addition, in second pattern, control signal stream C1, C2 can also be set at identical, and one of them waveform generator is turn-offed or omitted to necessity.
Fig. 5 B is the calcspar of Fig. 5 A waveform generator.Waveform generator comprises: resolver 451, identity recognizer 453, signal generator 460 and initial setting device 470.Resolver 451 is in order to receive control signal stream C, and after parsing each control signal bag, and its control project of complying with is sent to identity recognizer 453, signal generator 460 or initial setting device 470.Having the identification incident, is that the control project of the control signal bag of signal STH incident sends identity recognizer 453 in this example; Having control signal draws high or drags down the control project of the control signal bag of incident and send signal generator 460 to; Control project with control signal bag of initial setting incident sends initial setting device 470 to.
Fig. 5 C is the calcspar of Fig. 5 B identity recognizer.Identity recognizer 453 comprises comparing unit 456.The chip identification code Idp of each source electrode driver can for example be via the stitch of source electrode driver 212 on glass substrate via external setting-up, respectively it is drawn high or is pulled low to particular level and sets.Each source electrode driver 212 has different chip identification code IDp.The purpose identification code IDt that comparing unit 456 can contrast chip identification code IDp and solve from control signal stream C, and trigger control signal STH when both are consistent, wherein, the high level of the signal STH td2 that holds time can utilize comparing unit 456 to preestablish.
Shown in Fig. 5 B, signal generator 460 can be drawn high corresponding control signal after receiving the control project of control signal bag of the incident of drawing high, the high level electricity of control signal continues constant, receives the control project of the control signal bag of the incident of dragging down up to signal generator 460.Fig. 5 D is the waveform synoptic diagram that produces control signal POL.After the control project of the control signal bag of the incident of the drawing high H that receives POL, be about to produce the signal PH of high level; After the control project of the control signal bag of the incident that the drags down L that receives POL, promptly produce low level signal PL; The coupling of signal PH and PL is signal POL.Other control signal still produces according to the identical practice as CPV, STV, OEV.
In preferred embodiment of the present invention, when the high level of control signal is held time less than 8 time clock, as control signal TP and since each control signal bag be read as 8 time clock, utilize the incident of drawing high and the incident of dragging down to produce the method for control signal and inapplicable.Fig. 5 E is the waveform synoptic diagram that produces signal TP.When receive the TP signal draw high incident after, produce the signal TH of high level; Then begin counting, promptly produce low level signal TL up to counting to preset period of time tw1; The coupling of signal TH and TL is signal TP.
Grid control signal is except drawing high incident according to above-mentioned use and the incident that drags down produces, and still can produce according to source control signal such as STH or TP.Please refer to Fig. 3.For instance, produce in the example of grid control signal at foundation STH, the method that produces signal CPV is as follows: after the signal STH of source electrode driver (1) enables, its counter just starts and begins counting, draw high when being about to signal CPV, be about to signal CPV through period tw4 again and drag down through period td6.The method that produces signal STV is as follows: after the signal STH of source electrode driver (1) enabled, its counter just started and begins counting, draws high when being about to signal STV through period td7, is about to signal STV through period tw5 again and drags down.The method that produces signal OEV is as follows: after the signal STH of source electrode driver (1) enabled, its counter just started and begins counting, draws high when being about to signal OEV through period td8, is about to signal OEV through period tw6 again and drags down.
After initial setting device 470 receives the control project of control signal bag of initial setting incident, promptly export the DC value according to this to set corresponding parameters.
Because source electrode driver can produce source control signal voluntarily, do not need to produce by timing sequencer after pass to each source electrode driver by lead as the known practice, therefore can avoid the transmission attenuation of source control signal.
In addition, source electrode driver more can produce grid control signal and directly pass to gate drivers, not needing needs to draw very long lead to gate drivers by time schedule controller as the known practice, therefore can save the lead of time schedule controller to gate drivers, and promotes quality of signals.
[power management]
Fig. 6 A be can power saving reducing-pitch thread data transmission method synoptic diagram.In the reducing-pitch thread data transmission method, view data is to pass to more long-range source electrode driver 212 earlier, and then gives nearer source electrode driver 212 gradually.Shown in the 2nd figure, following explanation will be an example with the source electrode driver 212 (1)-212 (5) on the LCD left side.At first, in step 610, time schedule controller 225 passes to view data from flexible circuit board 230 source electrode driver 212 (1) and 212 (5) far away, and source electrode driver 212 (1) and 212 (5) promptly enters battery saving mode then, for example with the power remove of its data collector 424 and 426.Then, in step 612, time schedule controller 225 is passed to source electrode driver 212 (2) and 212 (4) with view data, and source electrode driver 212 (2) and 212 (4) promptly enters battery saving mode then.Then, in step 614, time schedule controller 225 is passed to source electrode driver 212 (3) with view data, and source electrode driver 212 (3) promptly enters battery saving mode then.Then, each source electrode driver 212 can be received load signal TP, and this moment, each source electrode driver 212 promptly was waken up to prepare to begin to drive panel 210.The transmission method of the source electrode driver 212 (6)-212 (10) of right one side of something is identical with said method, repeats no more in this.
Fig. 6 B be can power saving burst type data transmission method synoptic diagram.The burst type data transmission method that is to say that view data is to give the source electrode driver 212 of nearer end earlier, and then gives source electrode driver 212 far away gradually.Shown in the 2nd figure, following explanation will be an example with the half of source electrode driver 212 (1)-212 (5) in a LCD left side.When just beginning, all source electrode drivers 212 enter battery saving mode.In step 622, time schedule controller 225 wakes up from the nearest source electrode driver 212 (3) of flexible circuit board 230, and transmitted image data D.Then, in step 622, source electrode driver 212 (3) wake source drivers 212 (2) and 212 (4), time schedule controller 225 is passed to source electrode driver 212 (2) and 212 (4) with view data D then.Then, in step 624, source electrode driver 212 (2) and 212 (4) is wake source driver 212 (1) and 212 (5) respectively, and time schedule controller 225 is passed to source electrode driver 212 (1) and 212 (5) with view data D then.The transmission method of the source electrode driver 212 (6)-212 (10) of right one side of something is identical with said method, repeats no more in this.
In the above-mentioned battery saving mode, at least can be with the power remove of driver element 434, data collector 424 and 426.Because data collector 424 and 426 is in order to transmit image data, its amplitude of oscillation is big and frequency is high, institute's power consumption is very big, therefore can reduce the unnecessary data transmission via above-mentioned reducing-pitch thread transmission method or burst type transmission method, to improve the service efficiency of power supply effectively.In addition, control transceiver 414 and 416 can not be turned off power supply with waveform generator, still can receive and dispatch control signal stream and operates according to this to guarantee source electrode driver 212.
Above-mentioned reducing-pitch thread and burst type data transmission method can also mix use, for example are that source electrode driver 212 (1), 212 (2) and 212 (3) utilizes reducing-pitch thread, and source electrode driver 212 (4) and 212 (5) utilizes burst type, otherwise perhaps.The person can do variation according to spirit of the present invention generally to have the general knowledge in the art, no longer describes in detail in this.
In sum; though the present invention with preferred embodiment openly as above; right its is not in order to limit the present invention; any those skilled in the art; under the situation that does not break away from the spirit and scope of the present invention; can change and modification, so protection scope of the present invention is as the criterion with the claim institute restricted portion that is proposed.
Claims (7)
1. the control signal transmission method of a LCD, the control signal with the transmission time schedule controller comprises:
Each control signal difference boil down to one control signal bag with this time schedule controller, wherein, each control signal bag has a header field and a control project, wherein, this header field is in order to discern the initial of a control signal bag, and this control project further comprises a control field and a data field, wherein, this control field is in order to write down the kind of an incident, and this data field is in order to write down the parameter of this incident; And
Each control signal bag is comprehensive and be transmitted on minority or the plain conductor.
2. the control signal analytic method of a LCD, be used for the one source pole driver, to resolve control signal from time schedule controller, wherein, from each control signal of this sequential control boil down to one control signal bag, and comprehensive and be transmitted on minority or the plain conductor respectively, and wherein, each control signal bag has a header field and a control project, this header field is in order to discern the initial of a control signal bag, kind and the parameter of this control project in order to write down a corresponding incident comprises:
Determine the header field position of each control signal bag according to a predetermined pattern, to extract the control project of each control signal bag;
Resolve the control project of each control signal bag, with kind and the parameter that obtains each corresponding incident; And
Implement the corresponding incident of each control signal bag, to form each control signal of this time schedule controller.
3. method as claimed in claim 2, wherein, the control signal of this time schedule controller comprises: signal (OEV), source electrode driver start signal (STH), load signal (TP) are enabled in polar signal (POL), gate drivers start signal (STV), gate clock signal (CPV), output.
4. method as claimed in claim 2, wherein, the part control signal of this time schedule controller is drawn high incident and by one and is dragged down composition of matter and form.
5. method as claimed in claim 2, wherein, the part control signal of this time schedule controller is drawn high incident by one and is separated and can incident combine through one of a scheduled time slot.
6. method as claimed in claim 2, wherein, the initial setting signal compression is an initial setting bag, and comprehensive and be transmitted on minority or the plain conductor, to implement an initial setting incident of each control signal.
7. method as claimed in claim 6, wherein, this initial value setting signal is DC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100639232A CN100426367C (en) | 2005-03-30 | 2005-03-30 | Control signal transmission method for liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100639232A CN100426367C (en) | 2005-03-30 | 2005-03-30 | Control signal transmission method for liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
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| CN1841483A true CN1841483A (en) | 2006-10-04 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102270423A (en) * | 2010-06-01 | 2011-12-07 | 三星电子株式会社 | Mode conversion method, and display driving integrated circuit and image processing system using the method |
| CN101488309B (en) * | 2008-01-17 | 2012-11-28 | 奇美电子股份有限公司 | Driving circuit board, driving system and driving method for flat display device |
| CN107093400A (en) * | 2017-05-22 | 2017-08-25 | 杭州视芯科技有限公司 | LED display and its driving method |
| CN108182927A (en) * | 2017-12-29 | 2018-06-19 | 深圳市翠园科技有限公司 | System and its implementation with the remote interaction of plant is realized based on mobile terminal |
| CN109036299A (en) * | 2017-06-09 | 2018-12-18 | 京东方科技集团股份有限公司 | Data transmission method, device, system and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6078318A (en) * | 1995-04-27 | 2000-06-20 | Canon Kabushiki Kaisha | Data transfer method, display driving circuit using the method, and image display apparatus |
| JP3508837B2 (en) * | 1999-12-10 | 2004-03-22 | インターナショナル・ビジネス・マシーンズ・コーポレーション | Liquid crystal display device, liquid crystal controller, and video signal transmission method |
| JP3409768B2 (en) * | 2000-02-14 | 2003-05-26 | Ｎｅｃエレクトロニクス株式会社 | Display device circuit |
| JP2001324967A (en) * | 2000-05-17 | 2001-11-22 | Hitachi Ltd | Liquid crystal display device |
| JP3618086B2 (en) * | 2000-07-24 | 2005-02-09 | シャープ株式会社 | Multiple column electrode drive circuit and display device |
| CN1236417C (en) * | 2002-07-05 | 2006-01-11 | Nec液晶技术株式会社 | Image display device |
| KR100618673B1 (en) * | 2003-03-04 | 2006-09-05 | 비오이 하이디스 테크놀로지 주식회사 | Device for driving a liquid crystal display device |
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2005
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|---|---|---|---|---|
| CN101488309B (en) * | 2008-01-17 | 2012-11-28 | 奇美电子股份有限公司 | Driving circuit board, driving system and driving method for flat display device |
| CN102270423A (en) * | 2010-06-01 | 2011-12-07 | 三星电子株式会社 | Mode conversion method, and display driving integrated circuit and image processing system using the method |
| US9093020B2 (en) | 2010-06-01 | 2015-07-28 | Samsung Electronics Co., Ltd. | Mode conversion method, and display driving integrated circuit and image processing system using the method |
| CN102270423B (en) * | 2010-06-01 | 2017-04-12 | 三星电子株式会社 | Mode conversion method, and display driving integrated circuit and image processing system using the method |
| CN107093400A (en) * | 2017-05-22 | 2017-08-25 | 杭州视芯科技有限公司 | LED display and its driving method |
| CN109036299A (en) * | 2017-06-09 | 2018-12-18 | 京东方科技集团股份有限公司 | Data transmission method, device, system and storage medium |
| CN108182927A (en) * | 2017-12-29 | 2018-06-19 | 深圳市翠园科技有限公司 | System and its implementation with the remote interaction of plant is realized based on mobile terminal |
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