CN1287195C - Circuit and method for generating top rack wave of panel display - Google Patents
Circuit and method for generating top rack wave of panel display Download PDFInfo
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- CN1287195C CN1287195C CN 200310103882 CN200310103882A CN1287195C CN 1287195 C CN1287195 C CN 1287195C CN 200310103882 CN200310103882 CN 200310103882 CN 200310103882 A CN200310103882 A CN 200310103882A CN 1287195 C CN1287195 C CN 1287195C
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Abstract
The present invention relates to a circuit for generating a top rack wave of a panel display, and a method for generating a top rack wave. Input voltage and trigger voltage are received. The circuit for generating a top rack wave comprises a first switch, a Zener diode, a second switch and a control circuit, wherein one end of the first switch receives the input voltage, the other end of the first switch is coupled with an output end of the circuit for generating a top rack wave, an input end of the Zener diode is electrically coupled with the output end of the circuit for generating a top rack wave, the second switch determines whether the Zener diode is earthed, and the control circuit receives the trigger voltage, determines whether the first switch and the second switch are turned off according to the trigger voltage, and determines whether the output end of the circuit for generating a top rack wave outputs output voltage transmitted by the first switch or outputs output voltage formed by electric discharge of the Zener diode. The existing resistor is replaced by the Zener diode of the present invention. Output drive voltage of a gate integrated circuit can be changed. Differences of top rack wave shapes between the gate integrated circuits can be reduced. The feedthrough effect of the gate integrated circuits is consistent. Therefore, the present invention is more suitable for practicality.
Description
Technical field
The present invention relates to a kind of device that changes the top rake waveform, particularly relate to a kind of top rake waveform that in flat-panel screens, changes, with the top rake wave generation circuit and the top rake ripple production method thereof of the flat-panel screens of the device of eliminating 4 frequency bands.
Background technology
In general thin film transistor (TFT)-LCD (Thin FilmTransistor-Liquid Crystal Display is called for short TFT-LCD) on the market, it is to comprise the pair of electrodes matrix, and is to be full of liquid crystal molecule at this in to electrode matrix.In LCD, signal wire and scanning linear are orthogonal intersections, and an electrode matrix has formed a matrix therein.Wherein, scanning linear is the gate that is coupled to each thin film transistor (TFT) (TFT) in the LCD, and whether controls these thin film transistor (TFT)s of conducting, whether writes signal of video signal with control.
Seeing also shown in Fig. 5 A and Fig. 5 B, is respectively the oscillogram of the driving voltage of the driving voltage of existing known gate drive line front end and gate drive line end.Owing to scanning online dead resistance and stray capacitance, be subjected to the influence of RC constant and produce the variation of delay as the waveform of Fig. 5 A, so, will be transformed into waveform as Fig. 5 B at the end of scanning linear at the waveform of the waveform (shown in Fig. 5 A) of scanning linear front end.And the coupled voltages of the gate of thin film transistor (TFT) is to be defined as:
V.sub.COUPLED＝V.sub.G.*.C.sub.gs/(C.sub.gs+C.sub.LC+C.sub.ST)
Wherein, V.sub.G is the voltage that is supplied to gate, and C.sub.gs is the electric capacity between gate and source electrode, and C.sub.LC is liquid crystal born of the same parents' a electric capacity, and C.sub.ST is a kind of storable electric capacity.
In existing known techniques, the voltage that is supplied to the gate of thin film transistor (TFT) at the scanning linear front end is V.sub.G1, and the voltage that is supplied to the gate of thin film transistor (TFT) at the scanning linear end is V.sub.G2.And,, and cause the picture of LCD the situation of flicker to occur so coupled voltages V.sub.COUPLED1 will be greater than V.sub.COUPLED2 because V.sub.G1 is greater than V.sub.G2.
In order to solve the problem of flicker, solve to reduce gate voltage in the prior art.Please shown in Figure 6 in conjunction with consulting, be the circuit diagram that has known minimizing flashing device now.In Fig. 6, existing known minimizing flashing device 600 comprises the RC circuit, first switch 620, second switch 630 Sheffer stroke gates 640 that are made of resistance and electric capacity.Trigger voltage is to be used for controlling opening and closing of first switch 620 and second switch 630.Close when first switch 620, when second switch 630 was opened, the RC circuit can receive input voltage, and charges; Otherwise, when first switch 620 is opened, when second switch 630 is closed, the action that the RC circuit will discharge.Therefore, as known from the above, the V.sub.GH when the V.sub.GH in when charging will be than discharge is big.
Then seeing also shown in Fig. 7 A and Fig. 7 B, is respectively the oscillogram of driving voltage behind top rake of Fig. 5 A and Fig. 5 B.Because the driving voltage of scanning linear front end is by top rake, so the voltage V.sub.2. that the input voltage V.sub.G1 of gate will be sent to the scanning linear end no better than therefore, because coupled voltages V.sub.COUPLED1 almost equates with V.sub.COUPLED2, so can avoid the situation of film flicker to take place.But,, derive the problem that 4 frequency bands can appear in picture though this minimizing flashing device can be avoided the situation of film flicker.
Please continue to consult shown in Figure 6, its output voltage is 4 gate integrated circuit that export flat-panel screens to.On COG (Chip On Glass) framework, because the resistance of WOA (Wire On Array) line is bigger, so can cause the top rake waveform of the online driving voltage of scanning of 4 gate integrated circuit inconsistent.Seeing also shown in Fig. 8 A, Fig. 8 B and Fig. 8 C, is respectively the first order gate integrated circuit and the second level, the third level, the driving voltage of fourth stage gate integrated circuit and the oscillogram of time.After waveform is amplified, can know and find out, the first order (curve 802) can reach 375mV with the gap of the driving voltage of the second level (curve 804) gate integrated circuit, and the gap of the driving voltage of the first order (curve 802) and the third level (curve 806) gate integrated circuit is 772mV, and the first order (curve 802) is 1069mV with the gap of the driving voltage of the fourth stage (curve 808) gate integrated circuit.Because the top rake waveform of 4 gate integrated circuit can be inconsistent, it will cause the feedthrough effect of 4 gate integrated circuit different, and makes the picture of LCD have 4 frequency bands.
This shows that the top rake wave generation circuit of above-mentioned existing flat-panel screens and top rake ripple production method thereof still have many defectives, and demand urgently further being improved.For the top rake wave generation circuit that solves existing flat-panel screens and the defective of top rake ripple production method thereof, 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, this obviously is the problem that the anxious desire of relevant dealer solves.
Because the defective that the top rake wave generation circuit of above-mentioned existing flat-panel screens and top rake ripple production method thereof exist, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, actively studied innovation, in the hope of founding a kind of top rake wave generation circuit and top rake ripple production method thereof of new flat-panel screens, can improve the top rake wave generation circuit and the top rake ripple production method thereof of general existing flat-panel screens, 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 of the top rake wave generation circuit existence of existing flat-panel screens, and provide a kind of top rake wave generation circuit of new flat-panel screens, technical matters to be solved is to make it will have known resistance now to substitute for once receiving diode (Zener Diode), to change the driving voltage of gate integrated circuit output, and the difference of minimizing gate integrated circuit top rake waveform to each other, to make the feedthrough effect of gate integrated circuit consistent, thereby be suitable for practicality more, and have the value on the industry.
Another object of the present invention is to, overcome the defective that existing top rake ripple production method exists, and provide a kind of top rake ripple production method, technical matters to be solved is to make output voltage at 1/5 top rake during the time, and the amplitude that input voltage is pruned is between the top rake amplitude of 3/7 top rake amplitude and 6/7.
The object of the invention to solve the technical problems realizes by the following technical solutions.The top rake wave generation circuit of a kind of flat-panel screens that proposes according to the present invention, be to receive an input voltage and a trigger voltage, this top rake wave generation circuit comprises: one first switch, one end of this first switch is to receive this input voltage, and the other end of this first switch then is electrically coupled to the output terminal of this top rake wave generation circuit; One once received diode, had input end and output terminal, and this input end of once receiving diode is electrically coupled to the output terminal of this top rake wave generation circuit; One second switch, in order to determine this once received diode output head grounding whether; An and control circuit, receive and according to this trigger voltage, in order to determine whether closing of this first switch and this second switch, wherein, when this first switch cuts out, when this second switch is opened, the output terminal of this top rake wave generation circuit is the output voltage that this first switch of output transmits, and when this first switch opens, when this second switch was closed, to be output once received the output voltage of diode discharge by this to the output terminal of this top rake wave generation circuit.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The top rake wave generation circuit of aforesaid flat-panel screens, wherein said first switch is to be made up of transistor.
The top rake wave generation circuit of aforesaid flat-panel screens, wherein said second switch are to be made up of transistor.
The top rake wave generation circuit of aforesaid flat-panel screens wherein more comprises being coupled to the gate integrated circuit that a plane shows device.
The top rake wave generation circuit of aforesaid flat-panel screens, it is to export this output voltage to this gate integrated circuit that this plane shows device.
The object of the invention to solve the technical problems also adopts following technical scheme to realize.A kind of top rake ripple production method according to the present invention proposes is applicable to a flat-panel screens, and this method may further comprise the steps: a trigger voltage is provided; One input voltage is provided; According to this trigger voltage with optionally in the top rake top rake amplitude of in the time this input voltage being pruned, with a top rake ripple; And export this top rake ripple, and wherein, this top rake 1/5 is during the time, and the amplitude that this input voltage is pruned is between this top rake amplitude of this top rake amplitude of 3/7 and 6/7.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid top rake ripple production method, wherein said this top rake of 2/5 of reaching be during the time, and the amplitude that this input voltage is pruned is between this top rake amplitude of this top rake amplitude of 60/70 and 67/70.
Aforesaid top rake ripple production method, wherein said this top rake of 3/5 of reaching be during the time, and the amplitude that this input voltage is pruned is between this top rake amplitude of this top rake amplitude of 65/70 and 68/70.
Aforesaid top rake ripple production method, wherein said this top rake of 4/5 of reaching be during the time, and the amplitude that this input voltage is pruned is between this top rake amplitude of this top rake amplitude of 67/70 and 69/70.
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:
The present invention proposes a kind of top rake wave generation circuit of flat-panel screens, and this top rake wave generation circuit is to receive input voltage and trigger voltage, and comprises first switch, once received diode, second switch and control circuit.One end of this first switch is to receive this input voltage, and the other end then is electrically coupled to the output terminal of top rake wave generation circuit.Once the input end of diode received is electrically coupled to the output terminal of top rake wave generation circuit, and second switch optionally is coupled to once received the output terminal of diode, once receives whether ground connection of diode with decision.Whether control circuit receives and according to trigger voltage, closes to determine first switch and second switch.Wherein, when first switch cuts out, when second switch was opened, the output terminal of top rake wave generation circuit was the output voltage that output first switch transmits; Otherwise when first switch opens, when second switch was closed, the output terminal of top rake wave generation circuit was that output is by once receiving the output voltage of diode discharge.
Described according to preferred embodiment of the present invention, it is to be the top rake time that above-mentioned second switch closes to the time of opening once more, and at top rake in the time, the waveform of the input voltage top rake amplitude of will being pruned.
The present invention also proposes a kind of top rake ripple production method, and this top rake ripple production method is to be applicable in the flat-panel screens.This method is at first providing trigger voltage and input voltage, and then the control circuit of top rake wave generation circuit promptly determines whether to cut out first switch and the second switch of top rake wave generation circuit according to trigger voltage.When first switch is closed, when second switch is opened, the waveform of input voltage is not made top rake; Otherwise, when first switch is opened, when second switch is closed, then in the top rake top rake amplitude of in the time waveform of input voltage being pruned, to obtain the top rake ripple.At last,, promptly export the waveform of original input voltage, and be opened and second switch when being closed when first switch, promptly export this top rake ripple when first switch is closed and second switch when being opened.Wherein, the top rake 1/5 is during the time, and the amplitude that input voltage is pruned is between the top rake amplitude of 3/7 top rake amplitude and 6/7.
Via as can be known above-mentioned, the top rake wave generation circuit of flat-panel screens of the present invention and top rake ripple production method thereof, it is to receive input voltage and trigger voltage.The top rake wave generation circuit comprises first switch, once received diode, second switch and control circuit.One termination of this first switch is received input voltage, and the other end then is coupled to the output terminal of top rake wave generation circuit.Once the input end of diode received is electrically coupled to the output terminal of top rake wave generation circuit, and second switch then determines once to receive whether ground connection of diode.Whether control circuit receives and according to trigger voltage, closes to determine first switch and second switch, and the output terminal of decision top rake wave generation circuit is the output voltage that transmits of output first switch or exports by once receiving the output voltage of diode discharge.
By technique scheme, the present invention has the following advantages at least:
The present invention because adopt once received diode, therefore can reduce the difference of the first order to the driving voltage of exporting between fourth stage gate integrated circuit, make the first order consistent, the problem of 4 frequency bands is arranged and can eliminate because of the have big difference flat-panel screens that causes of feedthrough effect to the feedthrough effect between fourth stage gate integrated circuit.
The top rake wave generation circuit of flat-panel screens of the present invention, existing known resistance is substituted for once receiving diode (Zener Diode), and can change the driving voltage that the gate integrated circuit is exported, and can reduce the difference of gate integrated circuit top rake waveform to each other, to make the feedthrough effect of gate integrated circuit more consistent, thereby be suitable for practicality more, and have the value on the industry.
In addition, top rake ripple production method of the present invention makes output voltage at 1/5 top rake during the time, can make amplitude that input voltage pruned between the top rake amplitude of 3/7 top rake amplitude and 6/7.
In sum, the top rake wave generation circuit of the flat-panel screens of special construction of the present invention and top rake ripple production method thereof, have above-mentioned many advantages and practical value, and in like product and method, do not see have similar structural design and method to publish or use and really genus innovation, no matter it is at product structure, bigger improvement is all arranged on method or the function, have technically than much progress, and produced handy and practical effect, and the top rake wave generation circuit of more existing flat-panel screens and top rake ripple production method thereof have the multinomial effect of enhancement, thereby be suitable for practicality more, and have the extensive value of industry, really be a novelty, 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, below with preferred embodiment of the present invention and conjunction with figs. describe in detail as after.
Description of drawings
Figure 1A is the top rake wave generation circuit figure according to a kind of flat-panel screens of a preferred embodiment of the present invention.
Figure 1B is the detailed circuit diagram according to the top rake wave generation circuit of a kind of flat-panel screens of a preferred embodiment of the present invention.
Fig. 2 is the synoptic diagram according to a kind of flat-panel screens of a preferred embodiment of the present invention.
Fig. 3 A is according to a kind of first order gate integrated circuit of a preferred embodiment of the present invention and the driving voltage of second level gate integrated circuit and the oscillogram of time.
Fig. 3 B is according to first order gate integrated circuit in a kind of flat-panel screens of a preferred embodiment of the present invention and the outputting drive voltage of fourth stage gate integrated circuit and the oscillogram of time.
Fig. 4 A is the flow chart of steps according to a kind of top rake ripple production method of a preferred embodiment of the present invention.
Fig. 4 B is a kind of input voltage waveform figure behind top rake according to a preferred embodiment of the present invention.
Fig. 5 A is the oscillogram that has the driving voltage of known gate drive line front end now.
Fig. 5 B is the oscillogram that has the driving voltage of known gate drive line end now.
Fig. 6 is the circuit diagram that has known minimizing flashing device now.
Fig. 7 A is the oscillogram of driving voltage behind top rake of Fig. 5 A gate drive line front end.
Fig. 7 B is the oscillogram of driving voltage behind top rake of Fig. 5 B gate drive line end.
Fig. 8 A is first order gate integrated circuit and the driving voltage of second level gate integrated circuit and the oscillogram of time in a kind of existing known flat-panel screens.
Fig. 8 B is first order gate integrated circuit and the driving voltage of third level gate integrated circuit and the oscillogram of time in a kind of existing known flat-panel screens.
Fig. 8 C is first order gate integrated circuit and the driving voltage of fourth stage gate integrated circuit and the oscillogram of time in a kind of existing known flat-panel screens.
100,210: top rake wave generation circuit 102,114: output terminal
110: once received diode 112: input end
120,620: the first switches 130,630: second switch
140: control circuit 200: flat-panel screens
220: gate integrated circuit 230: liquid crystal face version
302,304,308: driving voltage 600: reduce flashing device
640: not gate 802,804,806,808: driving voltage
C, C21, C127, C128: electric capacity R, R17: resistance
R154, R156, R157: resistance R 158, R159: resistance
Q7, Q8, Q9, Q10: transistor S402: input voltage and trigger voltage are provided
S406: export this top rake ripple
S402: according to trigger voltage optionally in the top rake top rake amplitude of in the time input voltage being pruned, to obtain the top rake ripple
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, top rake wave generation circuit and its concrete structure of top rake ripple production method, method, step, feature and the effect thereof of the flat-panel screens that foundation the present invention is proposed, describe in detail as after.
Seeing also shown in Figure 1A, is the top rake wave generation circuit figure according to a kind of flat-panel screens of a preferred embodiment of the present invention.This top rake wave generation circuit 100 is to receive input voltage and trigger voltage, and top rake wave generation circuit 100 comprises and once receives diode 110, first switch 120, second switch 130 and control circuit 140.Wherein, as be familiar with this skill person and can know easily, first switch 120 can be to comprise by transistor forming with second switch 130, but all not as limit.
In the present embodiment, an end of first switch 120 is that to receive for example be the input voltage that the power supply unit (not shown) transmits, and the other end then is electrically coupled to the output terminal 102 of top rake wave generation circuit 100.Once the diode 110 of receiving has input end 112 and output terminal 114, and the input end 112 of diode 110 once received is electrically coupled to the output terminal 102 of top rake wave generation circuit 100.Second switch 130 is optionally to be coupled to once to receive the output terminal 114 of diode 110, once receives whether ground connection of diode 110 with decision.Whether control circuit 140 receives and according to trigger voltage, closes with second switch 130 to determine first switch 120.
In the present embodiment, the manner of execution of top rake wave generation circuit 100 is for closing when first switch 120, and when second switch 130 was opened, the output terminal 102 of top rake wave generation circuit 100 was directly to export the output voltage that first switch 120 transmits.Otherwise when first switch 120 is opened, when second switch 130 was closed, the output terminal 102 of top rake wave generation circuit 100 was output by once receiving the output voltage of diode 110 discharges.And be top rake ripple output voltage through top rake by once receiving the output voltage of diode 110 discharge.
In the present embodiment, second switch is to be the top rake time from closing to the time of opening once more, and at this top rake in the time, the waveform of the input voltage top rake amplitude of will being pruned.
Please then seeing also shown in Figure 1B, is the detailed circuit diagram according to the top rake wave generation circuit of a kind of flat-panel screens of a preferred embodiment of the present invention.In Figure 1B, it is a wherein detailed circuit of realizing top rake wave generation circuit 100 only, when side circuit designs, and certainly ought be not as limit.In Figure 1B, first switch 120 is formed by transistor Q7 and resistance R 154.Second switch 130 is by being made up of resistance R 156 and transistor Q8.Control circuit 140 is by resistance R 159, R158 and R157, and capacitor C 128, C127 and transistor Q10, Q9 form.In Figure 1B, in the top rake wave generation circuit 100 first switch 120, second switch 130, control circuits 140 and the coupling between the diode 110 of once receiving to close be for as described at Figure 1A.
Then seeing also shown in Figure 2ly, is the synoptic diagram according to a kind of flat-panel screens of a preferred embodiment of the present invention.In Fig. 2, flat-panel screens 200 comprises 210,4 gate integrated circuit of top rake wave generation circuit 220 and liquid crystal face version 230.In the present embodiment, such as in Figure 1A narration, the output of top rake wave generation circuit 210 comprises without the output voltage of top rake and output voltage through top rake, and top rake wave generation circuit 210 is that output voltage is exported in the gate integrated circuit 220.Wherein, the first order to fourth stage gate integrated circuit 220 is to be cascaded, and drive wire 222 corresponding with it all arranged.
Please in conjunction with consulting shown in Fig. 2, Fig. 3 A and Fig. 3 B, be respectively a kind of first order gate integrated circuit and the driving voltage of second level gate integrated circuit and the oscillogram of time according to a preferred embodiment of the present invention, and first order gate integrated circuit and the outputting drive voltage of fourth stage gate integrated circuit and the oscillogram of time.In Fig. 3 A, the driving voltage of first order gate integrated circuit 220 outputs is to be curve 302, and the driving voltage of second level gate integrated circuit 220 outputs is to be curve 304.Can find out that by the curve in the oscillogram 302 and 304 first order gate integrated circuit 220 is very little with the difference of the driving voltage of second level gate integrated circuit 220 outputs, with two driving voltages among existing known Fig. 8 A be 375mV, can be described as little a lot.And in Fig. 3 B, first order gate integrated circuit 220 can be that 1069mV significantly is reduced to a gap 220mV by gap among existing known Fig. 8 C with the difference of the driving voltage of fourth stage gate integrated circuit 220 outputs.
Please then consulting shown in Fig. 4 A, is the flow chart of steps according to a kind of top rake ripple production method of a preferred embodiment of the present invention.In the present embodiment, this method is at first providing trigger voltage and input voltage to top rake wave generation circuit (S402).
Then, the control circuit of top rake wave generation circuit promptly determines whether to cut out first switch and the second switch (S404) of top rake wave generation circuit according to trigger voltage.Wherein, when first switch is closed, when second switch is opened, input voltage is not made change; Otherwise, when first switch is opened, when second switch is closed, then in the top rake top rake amplitude of in the time waveform of input voltage being pruned, to obtain a top rake ripple.
At last,, promptly export the waveform of original input voltage, and be opened and second switch when being closed when first switch, promptly export this top rake ripple (S406) when first switch is closed and second switch when being opened.
Please consulting simultaneously shown in Fig. 4 B, is a kind of input voltage waveform figure behind top rake according to a preferred embodiment of the present invention.In Fig. 4 B, T represents the top rake time, and D then represents the top rake amplitude.Wherein, when 1/5T, the amplitude that input voltage is pruned is between 3/7D and 6/7D.
In preferred embodiment of the present invention, the top rake time, the amplitude that input voltage is pruned was between 60/70D and 67/70D when 2/5T.
In preferred embodiment of the present invention, the top rake time, the amplitude that input voltage is pruned was between 65/70D and 68/70D when 3/5T.
In preferred embodiment of the present invention, the top rake time, the amplitude that input voltage is pruned was between 67/70D and 69/70D at 4/5T.
Comprehensive the above, top rake wave generation circuit of the present invention is to utilize once to receive diode and reduce first order gate integrated circuit to the difference between the top rake waveform of the driving voltage of fourth stage gate integrated circuit output, to reduce the feedthrough effect of first order gate integrated circuit to fourth stage gate integrated circuit, not only reduced the flicker of flat display picture, and make about the picture brightness of flat-panel screens on average, and do not have the problem of 4 frequency bands.
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 method 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 (9)
1, a kind of top rake wave generation circuit of flat-panel screens is to receive an input voltage and a trigger voltage, it is characterized in that this top rake wave generation circuit comprises:
One first switch, an end of this first switch are to receive this input voltage, and the other end of this first switch then is electrically coupled to the output terminal of this top rake wave generation circuit;
One once received diode, had input end and output terminal, and this input end of once receiving diode is electrically coupled to the output terminal of this top rake wave generation circuit;
One second switch, in order to determine this once received diode output head grounding whether; And
One control circuit receives and according to this trigger voltage, in order to determining whether closing of this first switch and this second switch,
Wherein, when this first switch cuts out, when this second switch is opened, the output terminal of this top rake wave generation circuit is the output voltage that this first switch of output transmits, and when this first switch opens, when this second switch was closed, to be output once received the output voltage of diode discharge by this to the output terminal of this top rake wave generation circuit.
2, the top rake wave generation circuit of flat-panel screens according to claim 1 is characterized in that wherein said first switch is for to be made up of transistor.
3, the top rake wave generation circuit of flat-panel screens according to claim 1 is characterized in that wherein said second switch is for to be made up of transistor.
4, the top rake wave generation circuit of flat-panel screens according to claim 1 is characterized in that wherein more comprising a gate integrated circuit that is coupled to the apparent device in a plane.
5, the top rake wave generation circuit of flat-panel screens according to claim 4 is characterized in that wherein more comprising exporting this output voltage to this gate integrated circuit that this plane shows device.
6, a kind of top rake ripple production method is applicable to a flat-panel screens, it is characterized in that this method may further comprise the steps:
One trigger voltage is provided;
One input voltage is provided;
According to this trigger voltage with optionally in the top rake top rake amplitude of in the time this input voltage being pruned, with a top rake ripple; And
Export this top rake ripple,
Wherein, this top rake 1/5 is during the time, and the amplitude that this input voltage is pruned is between this top rake amplitude of this top rake amplitude of 3/7 and 6/7.
7, top rake ripple production method according to claim 6 is characterized in that wherein said this top rake of 2/5 of reaching during the time, and the amplitude that this input voltage is pruned is between this top rake amplitude of this top rake amplitude of 60/70 and 67/70.
8, top rake ripple production method according to claim 6 is characterized in that wherein said this top rake of 3/5 of reaching during the time, and the amplitude that this input voltage is pruned is between this top rake amplitude of this top rake amplitude of 65/70 and 68/70.
9, top rake ripple production method according to claim 6 is characterized in that wherein said this top rake of 4/5 of reaching during the time, and the amplitude that this input voltage is pruned is between this top rake amplitude of this top rake amplitude of 67/70 and 69/70.
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| CN 200310103882 CN1287195C (en) | 2003-11-18 | 2003-11-18 | Circuit and method for generating top rack wave of panel display |
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| CN 200310103882 CN1287195C (en) | 2003-11-18 | 2003-11-18 | Circuit and method for generating top rack wave of panel display |
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| CN101369409B (en) * | 2008-10-15 | 2010-06-02 | 上海广电光电子有限公司 | Method for driving liquid crystal display panel |
| CN101739974B (en) * | 2008-11-14 | 2012-07-04 | 群康科技(深圳)有限公司 | Pulse regulating circuit and driving circuit using same |
| TWI410941B (en) | 2009-03-24 | 2013-10-01 | Au Optronics Corp | Liquid crystal display capable of reducing image flicker and method for driving the same |
| CN101520998B (en) * | 2009-04-02 | 2011-01-05 | 友达光电股份有限公司 | Picture flicker improvable liquid crystal display device and relevant driving method thereof |
| CN105869592B (en) * | 2016-06-01 | 2018-09-07 | 深圳市华星光电技术有限公司 | Display panel and corner cutting circuit |
| TWI611390B (en) * | 2017-03-01 | 2018-01-11 | 友達光電股份有限公司 | Pixel circuit and display device thereof |
| CN110796994A (en) * | 2019-11-27 | 2020-02-14 | Tcl华星光电技术有限公司 | Liquid crystal display and driving circuit thereof |
-
2003
- 2003-11-18 CN CN 200310103882 patent/CN1287195C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1544975A (en) | 2004-11-10 |
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