CN100454378C - Scanning linear driver of displaying device and displaying device thereof - Google Patents
Scanning linear driver of displaying device and displaying device thereof Download PDFInfo
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- CN100454378C CN100454378C CNB2004100913251A CN200410091325A CN100454378C CN 100454378 C CN100454378 C CN 100454378C CN B2004100913251 A CNB2004100913251 A CN B2004100913251A CN 200410091325 A CN200410091325 A CN 200410091325A CN 100454378 C CN100454378 C CN 100454378C
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Abstract
The present invention relates to a scan line driving device of a display and a display device thereof. The scan line driving device of a display comprises a scan line driver and a control device, wherein the scan line driver is provided with a plurality of scan lines used for receiving basic time pulses, and scanning signals are orderly output by every scan line. The control device is connected with the scan line driver and the scan lines so as to receive basic actuating signals and a power supply. When the scanning signals of the first scan line in the scan lines are used for driving a display, the control device can control the scanning signals of the first scan line, the scanning signals of the first scan line are generated by the basic actuating signals, and the scanning signals of other scan lines are generated by the power supply.
Description
Technical field
The present invention relates to a kind of display device, particularly relate to a kind of scanning line driver and display device thereof of display.
Background technology
In recent years, because advantages such as that display panels has is in light weight, size thin, area is changeable, low operating voltage, power saving and radiationless lines, become the main flow of display panel gradually.Particularly, for portable electronic device, for example say, the screen of notebook computer, mobile phone screen, PDA (Personal Digital Assistant) (Personal Digital Assistance, " PDA ") display screen etc., have only liquid crystal screen just can meet its demand especially, so display panels have more and more important trend.
Seeing also shown in Figure 1ly, is the synoptic diagram of an existing known LCD.As shown in Figure 1, an existing known LCD 100 generally includes a liquid crystal panel 102, a gate pole driver 104 and one source pole driver 106.Include the array (array) that most pixels (pixel) are constituted in the liquid crystal panel 102, for example have the liquid crystal panel of 1024 * 768 resolution traditionally, promptly have the pixels of 1024 row and 768 row.And 3 sub-pixels (sub-pixel) that have three kinds of colors of red, green, blue in each pixel, just aforesaid liquid crystal panel has 3072 row and 768 sub-pixels that are listed as.As shown in Figure 1, have 3 sub-pixels in the pixel 112 of first row in the liquid crystal panel 102, be respectively 3 sub-pixel 112r, 112g and the 112b of three kinds of colors of red, green, blue, and also have pixel 114 etc. in first row in regular turn.Have in each sub-pixel a thin film transistor (TFT) (transistor is electric crystal, below all be called transistor) (thin film transistor, TFT) and a capacitor.The gate of each thin film transistor (TFT) is controlled by one scan line (scan line) by gate pole driver 104, and for example the gate of thin film transistor (TFT) is controlled by sweep trace SL1 among sub-pixel 112r, 112g and the 112b.
Seeing also shown in Figure 2ly, is the synoptic diagram of an existing known gate pole driver.As shown in Figure 2, gate pole driver 104 comprises a shift registor (shift register) 202, one electric potential transducer (level shifter) 204 and one output buffer (output buffer) 206.Shift registor 202 is connected to electric potential transducer 204, in order to receive a basic time pulse (clock) and an initial pulse (start pulse), when initial pulse began to drive shift registor 202, shift registor 202 was exported one first drive signal according to basic time pulse.Electric potential transducer 204 receives first drive signal and converts thereof into one second drive signal.Output buffer 206 is connected to electric potential transducer 204 and most bar sweep trace SL1 to SLm (for example traditional gate pole driver can be connected to 256 sweep traces), in order to receive second drive signal and to export an output signal in regular turn and arrive each bar sweep trace.
See also shown in Figure 2; in LCD, because each gate pole driver 104 can be connected to the multi-strip scanning line simultaneously, so its power consumption is quite big; and the signal between the sweep trace of adjacent two row interferes with each other through regular meeting, and causes the problem of cross-talk (cross-talk).In addition, because gate pole driver 104 internal wirings itself have the consumption that impedance causes power, so the power that gate pole driver 104 drives than several the sweep traces in back can be littler than the power of several the sweep traces in front than driving.Therefore also can cause the incorrect problem of the shown picture brightness of liquid crystal panel, particularly when the picture of whole liquid crystal panel at the same background color of demonstration, this problem can be obvious especially.
Therefore, for display panels, a kind of gate drive circuit that can avoid the mutual interference of picture element phase, whole image brightness irregularities or the power between adjacent two row on the existing known panel to consume problem such as excessive is necessary.
This shows that above-mentioned existing LCD obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.In order to solve the problem that LCD exists, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, this obviously is the problem that the anxious desire of relevant dealer solves.
Because the defective that above-mentioned existing LCD exists, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, and the utilization of cooperation scientific principle, actively studied innovation, scanning line driver and display device thereof in the hope of the display of founding a kind of new structure, can improve general existing LCD, make it have more practicality.Through constantly research, design, and after studying sample and improvement repeatedly, create the present invention who has practical value finally.
Summary of the invention
The objective of the invention is to, overcome the defective that existing LCD exists, and provide a kind of scanning line driver of new display, technical matters to be solved is to make it can improve that the mutual interference of picture element phase, whole image brightness irregularities or the power between adjacent two row consumes problems such as excessive on the existing known panel, thereby is suitable for practicality more.
Another object of the present invention is to, a kind of display device is provided, technical matters to be solved is to make it can improve that the mutual interference of picture element phase, whole image brightness irregularities or the power between adjacent two row consumes problems such as excessive on the existing known panel, thereby is suitable for practicality more.
The object of the invention to solve the technical problems realizes by the following technical solutions.The scanning line driver of a kind of display that proposes according to the present invention, it comprises: scan line driver, have most bar sweep traces, in order to receiving basic time pulse, and in regular turn to every aforesaid majority sweep trace output scanning signal; And control device, be connected to a scan line driver and an aforesaid majority sweep trace, in order to receive basic enable signal and power supply; Wherein, when the aforesaid sweep signal of an aforesaid majority sweep trace first sweep trace wherein is during in order to driving display, aforesaid control device can be controlled the aforesaid sweep signal that aforesaid basic enable signal produces aforesaid first sweep trace, and an aforesaid majority sweep signal of other an aforesaid majority sweep trace is produced by aforesaid power supply.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The scanning line driver of aforesaid display, wherein said control device comprises: most sub-control device, wherein each sub-control device be connected to an aforesaid majority sweep trace one of them; Wherein, when the aforesaid sweep signal of an aforesaid majority sweep trace aforesaid first sweep trace wherein is when driving aforesaid display, the aforesaid sweep signal that the aforesaid sub-control device that is connected with aforesaid first sweep trace is exported is produced by aforesaid basic enable signal, and is produced by aforesaid power supply with an aforesaid majority sweep signal that other an aforesaid majority sweep trace is exported.
The scanning line driver of aforesaid display, wherein each described majority control device comprises: first switch is connected to aforesaid power supply and aforesaid scan line driver; And second switch, be connected to aforesaid basic enable signal, aforesaid scan line driver, and a sweep trace in the aforesaid majority sweep trace; Wherein, when the aforesaid sweep signal of the relevant aforesaid sweep trace of aforesaid sub-control device is when driving aforesaid display, aforesaid first switch can cut out and aforesaid second switch can be opened, so the aforesaid sweep signal that aforesaid sub-control device is exported is produced by aforesaid basic enable signal, otherwise aforesaid first switch can be opened and aforesaid second switch can be closed, and therefore the aforesaid sweep signal exported of aforesaid sub-control device is produced by aforesaid power supply.
The scanning line driver of aforesaid display, wherein said first switch comprises the PMOS transistor, the transistorized gate of wherein aforesaid PMOS is connected to aforesaid scan line driver, and the transistorized source electrode of aforesaid PMOS is connected to aforesaid power supply, and the transistorized drain of PMOS is connected to aforesaid second switch.
The scanning line driver of aforesaid display, wherein said second switch comprises PMOS transistor AND gate nmos pass transistor, wherein the gate of aforesaid nmos pass transistor is connected to first subsignal of aforesaid scan line driver, the transistorized gate of aforesaid PMOS is connected to second subsignal of aforesaid scan line driver, aforesaid first subsignal and aforesaid second subsignal are reverse each other, the source electrode of aforesaid nmos pass transistor and the transistorized source electrode of aforesaid PMOS are connected to aforesaid basic enable signal, and the drain of aforesaid nmos pass transistor and the transistorized drain of aforesaid PMOS are connected to aforesaid first switch.
The scanning line driver of aforesaid display, wherein said display comprises LCD.
The scanning line driver of aforesaid display, wherein said scan line driver comprises the gate drive device.
The scanning line driver of aforesaid display, wherein said gate drive device comprises: shift registor, in order to receive aforesaid basic time pulse and initial pulse, when aforesaid initial pulse began to drive aforesaid shift registor, aforesaid shift registor can be exported first drive signal according to aforesaid basic time pulse; Electric potential transducer is in order to receive aforesaid first drive signal and to convert thereof into second drive signal; And output buffer, be connected to an electric potential transducer and an aforesaid majority sweep trace, also export an aforesaid majority sweep signal of an aforesaid majority sweep trace in regular turn in order to receive aforesaid second drive signal.
The object of the invention to solve the technical problems realizes by the following technical solutions.According to a kind of display device that the present invention proposes, it comprises: display panel; Scan line driver has most bar sweep traces, in order to the reception basic time pulse, and in regular turn to each aforesaid majority sweep trace output scanning signal; Control device connects an aforesaid gate pole driver and an aforesaid majority sweep trace, in order to receive basic enable signal and power supply; And the data line driver, in order to an aforesaid majority sweep signal of exporting according to an aforesaid majority sweep trace, input data is in aforesaid display panel; And wherein, when the aforesaid sweep signal of an aforesaid majority sweep trace first sweep trace wherein is when driving aforesaid display panel, aforesaid control device can be controlled the aforesaid sweep signal that aforesaid basic enable signal produces aforesaid first sweep trace, and an aforesaid majority sweep signal of other an aforesaid majority sweep trace is produced by aforesaid power supply.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid display device, wherein said control device comprises: most sub-control device, wherein each sub-control device be connected to an aforesaid majority sweep trace one of them; Wherein, when the aforesaid sweep signal of an aforesaid majority sweep trace aforesaid first sweep trace wherein is when driving aforesaid display panel, the aforesaid sweep signal that the aforesaid sub-control device that is connected with aforesaid first sweep trace is exported is produced by aforesaid basic enable signal, and is produced by aforesaid power supply with an aforesaid majority sweep signal that other an aforesaid majority sweep trace is exported.
The present invention compared with prior art has tangible advantage and beneficial effect.By above technical scheme as can be known, in order to reach aforementioned goal of the invention, major technique of the present invention thes contents are as follows:
In one embodiment of this invention, control device comprises most sub-control device, wherein each sub-control device be connected to sweep trace one of them.Wherein, when the sweep signal of sweep trace first sweep trace wherein is during in order to driving display, the sweep signal that the sub-control device that is connected with first sweep trace is exported is produced by basic enable signal, and is produced by power supply with sweep signal that other sweep trace is exported.
In one embodiment of this invention, each aforesaid majority control device comprises one first switch, is connected to power supply and scan line driver; And a second switch, be connected to basic enable signal, scan line driver, and a sweep trace.Wherein, the sweep signal of the sweep trace that the group control device is relevant is during in order to driving display, aforesaid first switch can cut out and second switch can be opened, so the sweep signal that sub-control device is exported is produced by basic enable signal, otherwise first switch can be opened and second switch can be closed, and therefore the sweep signal exported of sub-control device is produced by power supply.
In one embodiment of this invention, first switch comprises the PMOS transistor, the transistorized gate of wherein aforesaid PMOS is connected to scan line driver, and the transistorized source electrode of aforesaid PMOS is connected to power supply, and the transistorized drain of aforesaid PMOS is connected to second switch.
In one embodiment of this invention, second switch comprises PMOS transistor AND gate nmos pass transistor, wherein the transistorized gate of the gate of nmos pass transistor and PMOS is connected respectively to first subsignal and second subsignal of scan line driver, the transistorized source electrode of the source electrode of nmos pass transistor and PMOS is connected to basic enable signal, and the transistorized drain of the drain of nmos pass transistor and PMOS is connected to first switch.
In one embodiment of this invention, display comprises LCD.In addition, scan line driver comprises the gate drive device.In addition, the gate drive device can comprise, for example shift registor, electric potential transducer and output buffer.Shift registor is in order to receive basic time pulse and initial pulse, and when initial pulse began to drive shift registor, shift registor can be exported first drive signal according to basic time pulse.Electric potential transducer is in order to receive first drive signal and to convert thereof into second drive signal.Output buffer is connected to electric potential transducer and sweep trace, in order to receive aforesaid second drive signal and the sweep signal of output scanning line in regular turn.
In addition, the present invention proposes a kind of display device, comprises display panel, scan line driver, control device and data line driver.Scan line driver has most bar sweep traces, in order to the reception basic time pulse, and in regular turn to each sweep trace output scanning signal.Control device is connected to gate pole driver and sweep trace, in order to receive basic enable signal and power supply.The data line driver, in order to the sweep signal that the foundation sweep trace is exported, input data is in display panel.Control device is connected to gate pole driver and sweep trace, in order to receive basic enable signal and power supply.Wherein, when the sweep signal of sweep trace first sweep trace wherein is when driving display panel, control device can be controlled the sweep signal of first sweep trace, and first sweep signal of first sweep trace is produced by basic enable signal, and the sweep signal of other sweep trace is produced by power supply.
In one embodiment of this invention, control device comprises most sub-control device, wherein each sub-control device be connected to sweep trace one of them.Wherein, when the sweep signal of sweep trace first sweep trace wherein is during in order to driving display, the sweep signal that the sub-control device that is connected with first sweep trace is exported is produced by basic enable signal, and is produced by power supply with sweep signal that other sweep trace is exported.
In one embodiment of this invention, each sub-control device comprises first switch, is connected to power supply and scan line driver; And second switch, be connected to basic enable signal, scan line driver, and a sweep trace.Wherein, the sweep signal of the sweep trace that the group control device is relevant is during in order to driving display, first switch can cut out and second switch can be opened, so the sweep signal that aforesaid sub-control device is exported is produced by basic enable signal, otherwise first switch can be opened and second switch can be closed, and therefore the sweep signal exported of sub-control device is produced by power supply.
In one embodiment of this invention, first switch comprises the PMOS transistor, and wherein the transistorized gate of PMOS is connected to scan line driver, and the transistorized source electrode of PMOS is connected to power supply, and the transistorized drain of PMOS is connected to second switch.
In one embodiment of this invention, second switch comprises PMOS transistor AND gate nmos pass transistor, wherein the transistorized gate of the gate of nmos pass transistor and PMOS is connected respectively to first subsignal and second subsignal of scan line driver, the transistorized source electrode of the source electrode of nmos pass transistor and PMOS is connected to basic enable signal, and the transistorized drain of the drain of nmos pass transistor and PMOS is connected to first switch.
In one embodiment of this invention, display comprises LCD.In addition, scan line driver comprises the gate drive device.In addition, the gate drive device can comprise, for example shift registor, electric potential transducer and output buffer.Shift registor is in order to receive aforesaid basic time pulse and initial pulse, and when initial pulse began to drive shift registor, shift registor can be exported first drive signal according to basic time pulse.Electric potential transducer is in order to receive first drive signal and to convert thereof into second drive signal.Output buffer is connected to electric potential transducer and sweep trace, in order to receive second drive signal and the sweep signal of output scanning line in regular turn.
In sum, because in the present invention, basic enable signal is provided, and relevant control device, and can control basic enable signal according to the control signal in the gate pole driver, to export relevant enable signal, therefore can avoid the picture element phase mutual interference between adjacent two row on the known panel, the power consumption that more can solve basic enable signal is excessive, and problem such as whole image brightness irregularities.In addition, because control signal of the present invention can be used the shift registor in the gate pole driver or have the control signal that known shift registor itself has now, therefore the present invention can be used for existing known or shift registor of the present invention, and needn't increase new control signal again.
Via as can be known above-mentioned, the invention relates to a kind of scanning line driver and display device thereof of display, the scanning line driver of aforesaid display comprises scan line driver, and control device.Wherein scanning line driver has most bar sweep traces, in order to the reception basic time pulse, and in regular turn to each sweep trace output scanning signal.Control device is connected to scan line driver and sweep trace, in order to receive basic enable signal and power supply.Wherein, when the sweep signal of sweep trace first sweep trace wherein is during in order to driving display, control device can be controlled the sweep signal of first sweep trace, and the sweep signal of first sweep trace produced by basic enable signal, and the sweep signal of other sweep trace is produced by power supply.
By technique scheme, the scanning line driver of display of the present invention and display device thereof have following advantage at least:
1, because in the present invention, basic enable signal is provided, and relevant control device, and can control basic enable signal according to the control signal in the gate pole driver, to export relevant enable signal, therefore can avoid the picture element phase mutual interference between adjacent two row on the existing known panel, the power consumption that more can solve basic enable signal is excessive, and problem such as whole image brightness irregularities.
2, in addition, because control signal of the present invention can be used the shift registor in the gate pole driver or have the control signal that known shift registor itself has now, therefore the present invention can be used for existing known or shift registor of the present invention, and needn't increase new control signal again.
In sum, the scanning line driver of the display of special construction of the present invention and display device thereof, a kind of scanning line driver of display is provided, can improves that the mutual interference of picture element phase, whole image brightness irregularities or the power between adjacent two row consumes problems such as excessive on the existing known panel.In addition, the invention relates to provides a kind of display device, can improve that the mutual interference of picture element phase, whole image brightness irregularities or the power between adjacent two row consumes problems such as excessive on the known panel.It has above-mentioned many advantages and practical value, and in like product, do not see have similar structural design to publish or use and really genus innovation, no matter it all has bigger improvement on product, device or function, have large improvement technically, and produced handy and practical effect, and more existing LCD has the multinomial effect of enhancement, thereby is suitable for practicality more, really is a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of instructions, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by a preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Figure 1 shows that an existing known LCD synoptic diagram.
Figure 2 shows that an existing known gate pole driver synoptic diagram.
Figure 3 shows that a gate pole driver synoptic diagram according to one embodiment of the invention.
Figure 4 shows that work wave synoptic diagram according to a gate pole driver of one embodiment of the invention.
Figure 5 shows that another gate pole driver synoptic diagram according to one embodiment of the invention.
Figure 6 shows that sub-control device synoptic diagram according to one embodiment of the invention.
Figure 7 shows that work wave synoptic diagram according to another gate pole driver of one embodiment of the invention.
100: LCD
102: liquid crystal panel
104: gate pole driver
106: source electrode driver
112,114,122,124: pixel
112r, 112g, 112b, 122r, 122g, 122b: sub-pixel
SL1, SL2 ..., SLm: sweep trace
200: gate pole driver
202: shift registor
204: electric potential transducer
206: output buffer
300: gate pole driver
302: shift registor
304: electric potential transducer
306: output buffer
SL1, SL2 ..., SLm: sweep trace
G1, G2, G3: sweep signal
SR1, SR2, SR3: signal
G1, G2, G3 ..., Gm: sweep signal
500: gate pole driver
502: shift registor
504: electric potential transducer
506: output buffer
508: control device
SL1, SL2 ..., SLm: sweep trace
VDD: power supply
CS1, CS2 ..., CSm: control signal
512-1,512-2,512-m: sub-control device
EN-1, En-2 ..., EN-m: enable signal
600: sub-control device
602,604: switch
602p, 604p, 604n: transistor
N1, N2: subsignal
T1: time
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, scanning line driver and its embodiment of display device, structure, feature and the effect thereof of the display that foundation the present invention is proposed, describe in detail as after.
See also shown in Figure 3ly, be a gate pole driver synoptic diagram of foundation one embodiment of the invention.As shown in Figure 3, comprise a shift registor 302, an electric potential transducer 304 in the gate pole driver 300, and an output buffer 306.Shift registor 302 comprises, for example one has known shift registor or one two-way (bi-directional) shift registor now.Have known shift registor now and comprise, for example the shift registor shown in Fig. 2 202.Shift registor 302 shown in Fig. 3 is a two-way shift registor, and it receives a basic time pulse (clock), a direction of displacement (shift direction) and a first initial pulse and one second initial pulse.Signal according to direction of displacement, can determine by the direction (for example scanning sequency) of the first initial pulse or the direction (for example scanning sequency) of second initial pulse from sweep trace SLm to SL1 from sweep trace SL1 to SLm, drive shift registor 302, to export one first drive signal according to basic time pulse.
Electric potential transducer 304 can in order to, for example receive first drive signal and convert thereof into one second drive signal, its effect is, for example the current potential with first drive signal amplifies to obtain second drive signal.Comprise most impact dampers in the output buffer 306, for example amplifier etc.Wherein each impact damper is connected to electric potential transducer 304 and corresponding scanning line SL1 separately to SLm, in order to receive second drive signal and in regular turn the output scanning signal arrive each bar sweep trace.
For the problem that the signal between the sweep traces that solve adjacent two row in known can interfere with each other, the present invention more provides a basic enable signal, arrives sweep trace SL1 to SLm in order to the output interference signals that can not overlap each other.
See also shown in Figure 4ly, be the work wave synoptic diagram of the gate pole driver of foundation one embodiment of the invention.As shown in Figure 4, wherein first clock signal and second clock signal are to produce according to basic time pulse, and in the present embodiment, what second clock signal can be for first clock signal is anti-phase.Initial pulse signal can be according to the signal of direction of displacement, and decision is that the direction by the direction of the first initial pulse or second initial pulse is input to, for example the shift registor 302 of Fig. 3.After shift registor 302 receives initial pulse signal, through the effect of electric potential transducer 304, output buffer 306 with basic enable signal, at last can output scanning signal G1, G2 and G3 wait until sweep trace SL1, SL2 and SL3 etc.Should be noted in the discussion above that signal SR1, SR2 relevant with sweep trace SL1, SL2 and SL3 etc. shown in Fig. 4 and SR3 etc. overlap each other originally, therefore can cause the signal between adjacent two sweep traces that are listed as to interfere with each other.And in the present invention, because added basic enable signal, the part that signal SR1, SR2 and SR3 etc. overlap each other is removed, and can not had overlapping sweep signal G1, G2 and G3 each other.Therefore, the present invention can solve the problem that the signal between the sweep traces of adjacent two row in known interferes with each other effectively.
In the above-described embodiment, basic enable signal must be connected to SLm etc. with all sweep trace SL1, SL2, so that the sweep signal G1 that each sweep trace is exported respectively, G2 can not overlap each other to Gm etc., therefore can be in another embodiment of the present invention, add the load (loading) of a control device when more effectively alleviating basic enable signal running and the consumption of power.
See also shown in Figure 5ly, be another gate pole driver synoptic diagram of foundation one embodiment of the invention.As shown in Figure 5, in another embodiment of the present invention, gate pole driver 500 comprises, for example a shift registor 502, an electric potential transducer 504, an output buffer 506 and a control device 508.Shift registor 502 comprises, for example a known shift registor or one two-way (bi-directional) shift registor.Shift registor 502, electric potential transducer 504, output buffer 506 can be same or similar with shift registor 302, electric potential transducer 304, output buffer 306, and therefore similar part is no longer narrated.
In one embodiment of this invention, control signal CS1, CS2 or CSm are the control signal that shift registor 502 or existing known shift registor itself have, therefore the present invention can be used for existing known or shift registor of the present invention, and needn't increase new control signal again.
See also shown in Figure 6ly, be the sub-control device synoptic diagram of foundation one embodiment of the invention.As shown in Figure 6, sub-control device 600 can comprise, for example one first switch 602 and a second switch 604.First switch 602 comprises, a PMOS (P-type metal oxide semiconductor) transistor 602p for example, and second switch 604 comprises, for example a PMOS transistor 604p and a nmos pass transistor 604n.
See also shown in Figure 7ly, be the work wave synoptic diagram of another gate pole driver of foundation one embodiment of the invention.As shown in Figure 7, for example in time T 1, the sweep signal G1 that has only sweep trace SL1 be noble potential in order to will, for example the TFT transistor of first row is opened among Fig. 1, sweep trace SL2 then is electronegative potential to the sweep signal G2 of SLm to Gm.Sweep signal G1, G2 then are to be subjected to control signal CS1, CS2 among Fig. 5 to the control of CSm to Gm.Therefore, in time T 1, the first subsignal N1 (being positive potential in Fig. 7) that is input among the control signal CS1 of sub-control device 512-1 (please refer to Fig. 6) can open nmos pass transistor 604n and PMOS transistor 604p respectively with the second subsignal N2 (being negative potential in Fig. 7), and PMOS transistor 602p is closed, therefore the first enable signal EN-1 is produced by basic enable signal.And for sub-control device 512-2 to 512-m, because its first subsignal N1 is opposite with signal N1 and the N2 shown in Fig. 7 with the current potential of the second subsignal N2, therefore (please refer to Fig. 6) can close nmos pass transistor 604n and PMOS transistor 604p respectively, and PMOS transistor 602p is opened, therefore the second enable signal EN-2 is produced by power vd D to the m enable signal.
In sum, in Fig. 5, sub-control device 512-1 in the control device 508,512-2 or 512-m, be subjected to corresponding control signal CS1 respectively, the control of CS2 or CSm, therefore as sweep trace SL1, when SL2 need open the TFT transistor of aforesaid row (for example first row) to one of them (for example SL1) institute output scanning signal (for example sweep signal G1) of SLm, relevant enable signal (for example first enable signal EN-1) is to produce according to basic enable signal, and the enable signal of other sweep trace (for example sweep trace SL2 to the enable signal EN-2 of SLm to EN-m) then is to produce according to power vd D.All the other also can the rest may be inferred.Therefore, in the present invention, the load size that (for example time T 1, T2 etc.) basic enable signal only need bear a sweep trace in a certain period, the load of remaining sweep trace then is to be shared by power vd D, therefore can reduce the consumption of basic enable signal power in transmission course, and improve the incorrect problem of the shown picture brightness of liquid crystal panel.
In another embodiment of the present invention, also provide a kind of liquid crystal indicator.See also shown in Figure 1, liquid crystal indicator of the present invention also can use liquid crystal indicator 100 to illustrate, wherein the gate pole driver among Fig. 1 104 can be replaced by gate pole driver 300 of the present invention or 500, and also can comprise control device 508 of the present invention in the gate pole driver 500.And all the other same or analogous parts, below repeated description no longer.
In sum, because in the present invention, basic enable signal is provided, and relevant control device, and can control basic enable signal according to the control signal in the gate pole driver, to export relevant enable signal, therefore can avoid the picture element phase mutual interference between adjacent two row on the known panel, the power consumption that more can solve basic enable signal is excessive, and problem such as whole image brightness irregularities.In addition, because the control signal that control signal of the present invention can use shift registor in the gate pole driver or known shift registor itself to have, therefore the present invention can be used for known or shift registor of the present invention, and needn't increase new control signal again.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the structure that can utilize above-mentioned announcement and technology contents are made a little change or be modified to the equivalent embodiment of equivalent variations, but every content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (10)
1, a kind of scanning line driver of display is characterized in that it comprises:
Scan line driver has most bar sweep traces, in order to the reception basic time pulse, and in regular turn to every aforesaid majority sweep trace output scanning signal; And
Control device is connected to a scan line driver and an aforesaid majority sweep trace, in order to receive basic enable signal and power supply;
Wherein, when the aforesaid sweep signal of an aforesaid majority sweep trace first sweep trace wherein is during in order to driving display, aforesaid control device can be controlled the aforesaid sweep signal that aforesaid basic enable signal produces aforesaid first sweep trace, and an aforesaid majority sweep signal of other an aforesaid majority sweep trace is produced by aforesaid power supply.
2, scanning of a display line drive unit according to claim 1 is characterized in that wherein said control device comprises:
Most sub-control device, wherein each sub-control device be connected to an aforesaid majority sweep trace one of them;
Wherein, when the aforesaid sweep signal of an aforesaid majority sweep trace aforesaid first sweep trace wherein is when driving aforesaid display, the aforesaid sweep signal that the aforesaid sub-control device that is connected with aforesaid first sweep trace is exported is produced by aforesaid basic enable signal, and is produced by aforesaid power supply with an aforesaid majority sweep signal that other an aforesaid majority sweep trace is exported.
3, scanning of a display line drive unit according to claim 2 is characterized in that wherein each described majority control device comprises:
First switch is connected to aforesaid power supply and aforesaid scan line driver; And
Second switch is connected to aforesaid basic enable signal, aforesaid scan line driver, and a sweep trace in the aforesaid majority sweep trace;
Wherein, when the aforesaid sweep signal of the relevant aforesaid sweep trace of aforesaid sub-control device is when driving aforesaid display, aforesaid first switch can cut out and aforesaid second switch can be opened, so the aforesaid sweep signal that aforesaid sub-control device is exported is produced by aforesaid basic enable signal, otherwise aforesaid first switch can be opened and aforesaid second switch can be closed, and therefore the aforesaid sweep signal exported of aforesaid sub-control device is produced by aforesaid power supply.
4, scanning of a display line drive unit according to claim 3, it is characterized in that wherein said first switch comprises the PMOS transistor, the transistorized gate of wherein aforesaid PMOS is connected to aforesaid scan line driver, and the transistorized source electrode of aforesaid PMOS is connected to aforesaid power supply, and the transistorized drain of PMOS is connected to aforesaid second switch.
5, scanning of a display line drive unit according to claim 3, it is characterized in that wherein said second switch comprises PMOS transistor AND gate nmos pass transistor, wherein the gate of aforesaid nmos pass transistor is connected to first subsignal of aforesaid scan line driver, the transistorized gate of aforesaid PMOS is connected to second subsignal of aforesaid scan line driver, aforesaid first subsignal and aforesaid second subsignal are reverse each other, the source electrode of aforesaid nmos pass transistor and the transistorized source electrode of aforesaid PMOS are connected to aforesaid basic enable signal, and the drain of aforesaid nmos pass transistor and the transistorized drain of aforesaid PMOS are connected to aforesaid first switch.
6, scanning of a display line drive unit according to claim 1 is characterized in that wherein said display comprises LCD.
7, scanning of a display line drive unit according to claim 6 is characterized in that wherein said scan line driver comprises the gate drive device.
8, scanning of a display line drive unit according to claim 7 is characterized in that wherein said gate drive device comprises:
Shift registor, in order to receive aforesaid basic time pulse and initial pulse, when aforesaid initial pulse began to drive aforesaid shift registor, aforesaid shift registor can be exported first drive signal according to aforesaid basic time pulse;
Electric potential transducer is in order to receive aforesaid first drive signal and to convert thereof into second drive signal; And
Output buffer is connected to an electric potential transducer and an aforesaid majority sweep trace, also exports an aforesaid majority sweep signal of an aforesaid majority sweep trace in regular turn in order to receive aforesaid second drive signal.
9, a kind of display device is characterized in that it comprises:
Display panel;
Scan line driver has most bar sweep traces, in order to the reception basic time pulse, and in regular turn to each aforesaid majority sweep trace output scanning signal;
Control device connects an aforesaid gate pole driver and an aforesaid majority sweep trace, in order to receive basic enable signal and power supply; And
The data line driver, in order to an aforesaid majority sweep signal of exporting according to an aforesaid majority sweep trace, input data is in aforesaid display panel; And
Wherein, when the aforesaid sweep signal of an aforesaid majority sweep trace first sweep trace wherein is when driving aforesaid display panel, aforesaid control device can be controlled the aforesaid sweep signal that aforesaid basic enable signal produces aforesaid first sweep trace, and an aforesaid majority sweep signal of other an aforesaid majority sweep trace is produced by aforesaid power supply.
10, display device according to claim 9 is characterized in that wherein said control device comprises:
Most sub-control device, wherein each sub-control device be connected to an aforesaid majority sweep trace one of them;
Wherein, when the aforesaid sweep signal of an aforesaid majority sweep trace aforesaid first sweep trace wherein is when driving aforesaid display panel, the aforesaid sweep signal that the aforesaid sub-control device that is connected with aforesaid first sweep trace is exported is produced by aforesaid basic enable signal, and is produced by aforesaid power supply with an aforesaid majority sweep signal that other an aforesaid majority sweep trace is exported.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100913251A CN100454378C (en) | 2004-11-19 | 2004-11-19 | Scanning linear driver of displaying device and displaying device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100913251A CN100454378C (en) | 2004-11-19 | 2004-11-19 | Scanning linear driver of displaying device and displaying device thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1779769A CN1779769A (en) | 2006-05-31 |
| CN100454378C true CN100454378C (en) | 2009-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100913251A Expired - Fee Related CN100454378C (en) | 2004-11-19 | 2004-11-19 | Scanning linear driver of displaying device and displaying device thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111261093B (en) * | 2020-03-25 | 2021-08-24 | Tcl华星光电技术有限公司 | Display panel |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001013478A (en) * | 1999-06-28 | 2001-01-19 | Fujitsu Ltd | Source driver for liquid crystal display device and liquid crystal display device using the same |
| CN1387662A (en) * | 1999-11-08 | 2002-12-25 | 爱特梅尔股份有限公司 | Drive circuit for liquid crystal display cell |
| US6552709B1 (en) * | 1999-11-08 | 2003-04-22 | Nec Corporation | Power-on display driving method and display driving circuit |
-
2004
- 2004-11-19 CN CNB2004100913251A patent/CN100454378C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001013478A (en) * | 1999-06-28 | 2001-01-19 | Fujitsu Ltd | Source driver for liquid crystal display device and liquid crystal display device using the same |
| CN1387662A (en) * | 1999-11-08 | 2002-12-25 | 爱特梅尔股份有限公司 | Drive circuit for liquid crystal display cell |
| US6552709B1 (en) * | 1999-11-08 | 2003-04-22 | Nec Corporation | Power-on display driving method and display driving circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1779769A (en) | 2006-05-31 |
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